PASP: Common Difficulties Encountered by Buyers During Selection & HiSiaddi’s Solutions

As a new-type foreign trade service provider driven by both technology commercialization and foreign trade services, HiSiaddi has established the "1+2+3+4=1" service system and can supply original factory sources of PASP from multiple well-known brands. As a foreign trade enterprise with R&D capabilities, HiSiaddi will systematically analyze common difficulties faced by B2B buyers sourcing PASP from China and propose targeted solutions from a professional perspective.

If you require more professional and in-depth analysis on PASP selection, please contact HiSiaddi customer service.

I. Manufacturers of Eco Zero-Phosphorus Industrial Water Treatment Chemicals

(I) Core Pain Points

Declining scale inhibition capacity in high-calcium water, precipitation failure under extreme acid/alkaline environments, deactivation from degradation under high-temperature working conditions, excessive biological slime growth, unstable operation caused by molecular weight fluctuations

1. When water calcium hardness is elevated, conventional PASP lacks sufficient chelation to encapsulate scale crystals, leading to rapid scaling on heat exchangers and pipelines and reduced heat exchange efficiency. The root cause lies in excessively broad molecular weight distribution and poor adaptability to high-hardness water.

2. Flocculent precipitation easily occurs under strong acidic or alkaline water conditions, deactivating molecular structures and triggering pipeline blockages and sudden scaling.

3. Gradual hydrolytic degradation of chemical agents occurs above 45°C with sustained loss of efficacy, forcing increased dosing rates and elevated operational costs.

4. High levels of unpolymerized monomers and low-molecular organic matter in products act as nutrient sources for microorganisms, resulting in slime and algae proliferation in pools and pipelines, requiring additional biocide dosage.

5. Significant molecular weight differences between batches lead to unstable scale inhibition and dispersing performance, forcing operation staff to repeatedly adjust chemical dosing parameters and increasing labor costs.

(II) Targeted Solutions

1. Adopt narrow-distribution polymerization technology to enhance tolerance to high-calcium water and deliver stable scale inhibition performance in high-hardness water bodies.

2. Optimize molecular structures to widen applicable pH ranges, preventing precipitation and performance loss under strong acid and alkaline conditions.

3. Upgrade formulations to boost high-temperature and anti-hydrolysis performance, maintaining unattenuated efficacy under long-term operation at 50°C without blind dosage increases.

4. Deeply remove residual monomers and low-molecular impurities to eliminate microbial nutrient sources and reduce slime and algae growth at the source.

5. Strictly control molecular weight for each batch to maintain consistent core performance, enabling fixed long-term system operation parameters.

II. Green Ecological Agricultural Additive Enterprises

(I) Core Pain Points

Unstable chelation of trace elements, delamination and flocculation when compounded with high-salinity fertilizer solutions, insufficient activity under low-temperature conditions, crop leaf burn from residual impurities, lack of organic certifications blocking access to high-end markets

1. Weak stable chelation of zinc, iron, magnesium and other medium/trace elements leads to easy nutrient precipitation and reduced crop uptake efficiency, severely diminishing fertilizer efficacy.

2. Poor compatibility when mixed with high-concentration water-soluble fertilizers causes caking and delamination, easily clogging spray nozzles for field application.

3. At low temperatures of 5–10°C, chemical penetration and spreading capacity decline, resulting in easy liquid loss and poor rain wash resistance.

4. Excessive irritating organic residues in raw materials cause yellowing and wilting of seedling and young leaves after spraying, generating planting losses.

5. Absence of EU organic agriculture and ecological fertilizer certifications and test reports blocks market access to high-end organic planting channels in Europe and America.

(II) Targeted Solutions

1. Strengthen chelating performance to firmly bind all types of medium and trace elements, extend fertilizer efficacy and boost crop nutrient uptake rates.

2. Improve salt tolerance to adapt to high-concentration salt fertilizer systems, maintaining uniform liquid state after mixing without flocculation or nozzle clogging.

3. Preserve low-temperature activity to deliver reliable penetration and adhesion under cold field conditions for stable fertilizer efficacy.

4. Adopt agricultural-grade deep refining impurity removal for mild compositions that avoid crop leaf burn, suitable for all crop varieties.

5. Supply complete biosafety and organic agricultural access test documents to support clients in developing high-end organic agricultural markets in Europe and America.

III. Seawater Desalination / RO Pure Water System Manufacturers

(I) Core Pain Points

Failed dispersing capacity in high-salinity environments, weak silicate scale inhibition, easy scaling during shutdown static storage, precipitation-induced membrane blockage at low inlet water temperatures, excessive pure water TOC from organic residues

1. High salinity in seawater and brackish water destroys molecular structures via strong electrolytes, preventing effective scale crystal dispersion and causing rapid membrane surface scaling.

2. Weak inhibition of silicate and boron-silicon composite scale forms hard water deposits after long-term operation, leading to permanent attenuation of membrane flux.

3. Ion enrichment occurs rapidly during equipment shutdown with static water flow; conventional products deliver insufficient static scale inhibition, forming dense scale layers within short periods.

4. Reduced chemical solubility in low-temperature seawater precipitates fine flocs and microcrystals that block membrane pores and directly lower water production capacity.

5. High low-molecular organic residue levels push total organic carbon (TOC) in pure water above standard limits, failing to meet specifications for high-purity pure water and boiler make-up water.

(II) Targeted Solutions

1. Modify molecular structures to enhance salt tolerance, maintaining stable molecular conformation and sustained dispersing/scale inhibition performance in high-salinity water bodies.

2. Conduct special formula optimization targeting silicate and boron-silicon composite scale to effectively suppress hard scale formation and extend membrane element service life.

3. Strengthen static scale inhibition performance to stably encapsulate scale crystals during equipment startup and shutdown, avoiding sudden scaling and differential pressure rises.

4. Optimize low-temperature compatibility for complete dissolution at 5°C low-temperature water with no precipitation or membrane module blockage.

5. Deeply remove low-molecular organic residues to control TOC within standard limits and meet high-end pure water production requirements.

IV. Environmental Chemical Compounding & Private Label Manufacturers

(I) Core Pain Points

Fluctuating chelating values impairing finished product quality, mutual performance reduction when compounded with biocides, discoloration under high-temperature storage/shipping, turbidity when mixed with high-molecular auxiliaries, finished product delamination and efficacy attenuation after long-term storage

1. Inconsistent batch chelating values and solid content produce composite chemicals with uneven performance under fixed formulations, leading to mass defective products.

2. High impurity levels in raw materials unbalance system stability when mixed with biocides and corrosion inhibiting auxiliaries, reducing both scale inhibition and bacteriostatic effects.

3. Oxidative discoloration occurs during high-temperature warehousing and ocean shipping, prohibiting production of transparent high-end export chemicals.

4. Poor compatibility with polycarboxylate, sulfonate and other high-molecular auxiliaries generates turbid liquid and flocs after mixing, restricting high-end product manufacturing.

5. Insufficient system stability causes finished compound chemicals to delaminate and lose efficacy after long-term storage, failing shelf-life standards for overseas products.

(II) Targeted Solutions

1. Precisely lock core parameters including chelating value and solid content for uniform batch indicators, enabling direct mass production under existing formulas and stable finished product quality.

2. Deep purification removes interfering impurities for compatibility with all types of auxiliaries and biocides, delivering synergistic performance gains after compounding.

3. Adopt decolorization and anti-oxidation processes for transparent raw materials resistant to discoloration under high temperatures, suitable for high-end private label chemical production.

4. Develop low-interference pure systems that remain transparent and homogeneous with no turbidity or precipitation when mixed with mainstream high-molecular auxiliaries.

5. Enhance overall system stability for finished compound chemicals that remain undelaminated with unattenuated performance after 12 months of ambient-temperature storage, meeting long-cycle circulation requirements.

V. Cross-Border Chemical Raw Material Repackaging Distributors

(I) Core Pain Points

Counterfeit high-purity adulterated products, artificially diluted active ingredients, degradation and deterioration under high-temperature ocean shipping, incomplete compliance documents causing customs detention, component sedimentation after long-term tote storage

1. Some suppliers adulterate cheap polymers to counterfeit pure PASP with substandard biodegradation rates, resulting in failed environmental testing and project acceptance for end clients.

2. Artificial water dilution with falsely labeled solid content and active indicators drastically reduces chelating and scale inhibition effects for end users, triggering returns and compensation claims.

3. High-temperature enclosed environments during ocean shipping accelerate chemical hydrolysis and oxidation, leading to obvious efficacy attenuation upon arrival.

4. Missing REACH-SVHC screening, CLP safety data sheets, biodegradation reports and other English compliance documents result in customs detention in Europe and America and ban local sales.

5. Long-term static storage of bulk IBC totes triggers light/heavy component sedimentation that cannot be fully homogenized via simple stirring, leading to uneven indicators for repackaged small-batch products.

(II) Targeted Solutions

1. Supply 100% pure polyaspartic acid with batch-by-batch biodegradation test reports, zero adulteration and support for third-party global re-inspection.

2. Issue full-item test reports per batch with truthful labeling of solid content, chelating value and other indicators; no dilution or false labeling to guarantee end-use performance.

3. Stabilize products against high-temperature degradation with anti-hydrolysis and anti-oxidation treatment, maintaining consistent quality with factory standards after long-distance ocean shipping.

4. Deliver complete sets of English compliance documents with goods, including safety specifications, hazardous substance screening and ecological testing reports, enabling unimpeded customs clearance and market circulation.

5. Optimize material homogeneity with standardized stirring protocols to suppress component sedimentation and deliver uniform indicators for all repackaged batches.

For more professional and in-depth analysis on PASP selection, please contact HiSiaddi customer service.

Lead time

The monthly inventory volume of PASP is 150 tons, with appropriate adjustments upwards or downwards in response to peak and off-peak seasons.

HiSiaddi safeguards the supply stability of PASP through the following measures:

1. Supply of one mainstream PASP model by 3 premium factories

(1) Performance evaluation and screening of PASP brand factories based on on-time delivery rate, batch pass rate, timeliness of risk alerts, and completeness of documentation to assess their supply stability.

(2) For each mainstream model or major grade of PASP, secure 1 primary high-quality brand manufacturer and 2 backup high-quality manufacturers.

(3) Each factory operates independent production lines in separate production zones to prevent production halts caused by major unforeseen incidents such as environmental production suspensions and power outages.

2. Technological transformation partnerships and long-term sales binding for PASP

Through long-term cooperation with brand manufacturers via technology commercialization and authorized distribution channels, HiSiaddi can effectively strengthen supervision over the production processes of brand manufacturers, optimize full-process traceability management, improve batch stability control, and further reinforce real-time monitoring of the supply stability of PASP products.

Long-term Annual Framework Supply Guarantee Agreement. HiSiaddi signs 12-month long-term agreements with leading manufacturers. The agreements specify the minimum guaranteed supply volume, maximum price hike range, and priority production scheduling rights during peak seasons. It is stipulated that manufacturers shall issue a 30-day prior written notice if production is suspended due to environmental rectification or equipment maintenance, and backup manufacturers will be activated to replenish goods accordingly.

3. 4 warehouses and 150 peak & off-peak demand forecasting

We have 4 warehouses, which are jointly operated and managed with suppliers to store hot-selling products.The four warehouses are located at Qingdao Port in North China, Ningbo Port in East China, Shenzhen Port in South China, and Zhengzhou, China’s inland logistics hub. This setup guarantees sufficient supply and timely shipment of PASP during peak seasons.

HiSiaddi issues a rolling demand forecast covering the subsequent three months on the 25th of each month, allowing manufacturers to reserve production capacity in accordance with the forecast. Any new urgent orders from overseas clients will be prioritized to draw on inventories or production capacity from backup manufacturers.

4. Multi-channel logistics to resolve vessel congestion and inspection delays for PASP sea and land shipments

Unstable logistics for PASP will extend delivery lead times. HiSiaddi has established alternative arrangements covering multiple freight forwarders, ports and transportation solutions:

(1) Binding of multiple professional chemical freight forwarders for PASP

Each product is assigned 2 to 3 freight forwarders with hazardous chemical/food transport qualifications affiliated with different shipping lines. Alternative sailing schedules can be switched to immediately in case of space shortages or customs inspections on a single shipping route.

(2) Backup transportation solutions for PASP

Ocean freight serves as the standard mode; air freight and rail freight are reserved as alternatives for urgent orders. Long-term agreements for temperature-controlled containers are signed for temperature-sensitive and perishable food additives to secure shipping space.

(3) Visual tracking and digital early warning for PASP

Freight forwarders synchronize daily updates on container loading, customs declaration, vessel loading and port arrival milestones. If customs inspection occurs, replenishment from backup inventory will be initiated immediately to shorten client waiting periods.

Full-chain digital early warning automatically monitors four categories of risks:

• Factory side: Expiring supplier environmental assessment certificates, renewal of production permits, scheduled major equipment overhauls, and notifications of price hikes for upstream raw materials;

• Inventory side: Inventory falling below safety thresholds, excessive inventory age, and batches failing quality inspection;

• Logistics side: Shipping line space shortages, strikes at destination ports, and updates to customs policies;

• Overseas side: Revisions to additive regulations and adjustments to import restriction lists in target countries.

Early warning notifications are automatically pushed to procurement and business leads, allowing backup suppliers or inventory contingency plans to be activated in advance

PASP: What Qualifications and Certifications Have China’s Well-Known Brands Obtained? What Is Market Feedback?

As a new foreign trade service provider driven by dual engines of technology transformation and foreign trade, HiSiaddi has built a "1+2+3+4=1" service system and can supply original products from multiple well-known PASP brands.

As an R&D-oriented foreign trade service provider, HiSiaddi does not only promote a single manufacturer’s products. We objectively analyze multiple export-competitive leading Chinese PASP brands and share their certifications and market feedback to help buyers make efficient, secure purchasing decisions.

If you require more authentic, objective information on multiple leading Chinese PASP brands, please contact HiSiaddi customer service.

I. Taihe Technology (Shandong): Global Production Capacity Leader, High-Purity and Compound Grades Hold Long-Term Certifications from Global Key Clients

Core Mainstream Grades

· TH-PASP-101: 40% Liquid Sodium Polyaspartate (General Industrial Water Treatment Grade), molecular weight 1,000–5,000 Da, scale inhibition rate ≥98%.

· TH-PASP-202: 95% Potassium Polyaspartate Powder (Premium Liquid Fertilizer Grade), calcium, magnesium and zinc ion chelation efficiency ≥95%.

· TH-PASP-303: High-Purity Modified PASP (Semiconductor / Pharmaceutical Grade), purity ≥98%, PDI ≤1.15, residual metal ions ≤5 ppm.

Global Market Feedback (Core Highlights)

1. Industrial Water Treatment: Mass orders from European power and petrochemical enterprises (RWE Group, TotalEnergies). After replacing phosphorus-based chemicals, total phosphorus in circulating water discharge remains stable below 0.1 mg/L, cutting equipment maintenance costs by 35% with a 100% repeat order rate for three consecutive years.

2. Agriculture: Fertilizer manufacturers in Southeast Asia (Vietnam, Thailand) and the Middle East (Israel, Saudi Arabia) adopt TH-PASP-202. Field trials show 22%–28% higher fertilizer utilization and 10%–15% crop yield growth, earning recognition as a "Green Efficiency-Enhancing Product" by the Southeast Asian Agricultural Materials Association.

3. High-End Customization: Supplies TH-PASP-303 to Samsung Semiconductor (South Korea) and TSMC (Taiwan, China) for ultrapure water systems; export volume surged 42% year-on-year in 2025, making Taihe the sole Chinese PASP brand integrated into global semiconductor supply chains.

Authoritative Accreditations (International + Domestic)

· International Certifications: Full-model EU REACH registration, US EPA Drinking Water Additive Certification, ISO14001 / ISO9001, ISO14067 Carbon Footprint Certification.

· Domestic Qualifications: Co-formulator of the HG/T3822-2020 industry standard, MIIT Green Manufacturing Demonstration Enterprise, Leading Enterprise Certification from the China Water Treatment Agent Association.

· International Awards: Winner of the 2024 Sustainable Chemical Innovation Award by the European Chemical Industry Council (Cefic), the only Asian PASP manufacturer to receive the honor.

II. Fumiao Technology (Jiangsu): Dual Strengths in Agriculture & Oilfields, Bio-Based PASP Earns Global Green Certifications

Core Mainstream Grades

· FM-PASP-A1: 40% Liquid Bio-PASP (Agricultural Fertilizer Synergist Grade), 28-day biodegradability ≥92% via bio-fermentation production.

· FM-PASP-B2: PASP-PESA Compound Agent (Oilfield Reinjection Water / Seawater Desalination Grade), heat-resistant up to 120°C, scale inhibition rate ≥96%.

· FM-PASP-C3: Low-Metal PASP (Electronics / Daily Chemical Grade), heavy metal residue ≤1 ppm, compatible with sensitive skin detergents.

Global Market Feedback (Core Highlights)

1. Agriculture: Ten-thousand-mu demonstration trials in Vietnam’s Mekong Delta and Thailand’s major rice-producing regions. FM-PASP-A1 cuts nitrogen runoff by 30% and improves soil compaction by 40%, recommended as a premium fertilizer additive by the Southeast Asian Rice Growers Association.

2. Oilfields: Cooperates with Saudi Aramco and ADNOC. Replacing traditional polyacrylate chemicals reduces wastewater COD emissions by 63%, earning recognition as an "Eco-Friendly Oilfield Chemical" by the Middle East Petrochemical Association; Middle East export revenue rose 38% in 2025.

3. Daily Chemicals: Supplies European natural personal care brands (Weleda, L’Occitane). FM-PASP-C3 is used in sensitive skin laundry detergents to chelate water metal ions and prevent fabric yellowing, with a 92% client repeat order rate.

Authoritative Accreditations (International + Domestic)

· International Certifications: EU REACH registration, ECOCERT Organic Agriculture Certification, EU Ecolabel, OECD 301F Biodegradability Certification.

· Domestic Qualifications: MIIT Green Design Product Certification, Recommended Product by the National Agricultural Technology Extension Service Center under the Ministry of Agriculture and Rural Affairs, Standing Director Unit of the China Biostimulant Committee.

· Technical Endorsement: Operates China’s first 10,000-ton annual bio-fermentation PASP production line; technical achievements featured in the 2025 Green Technology Casebook of China Petroleum & Petrochemical Industry.

III. Yuanlian Chemical (Shandong): Precisely Controllable Molecular Weights, Highly Stable Grades Widely Recognized by European and American Industrial Clients

Core Mainstream Grades

· YL-PASP-L1: Low-Molecular-Weight Sodium PASP (High-Hardness Water Grade), molecular weight 3,000–5,000 Da, scale inhibition rate ≥98%.

· YL-PASP-M2: Medium-Molecular-Weight Potassium PASP (Industrial Circulating Water / Seawater Desalination Grade), molecular weight 8,000–15,000 Da, corrosion inhibition rate ≥90%.

· YL-PASP-H3: Customized PASP Powder (Coating / Papermaking Dispersant Grade), purity ≥95%, PDI ≤1.2.

Global Market Feedback (Core Highlights)

1. Industrial Water Treatment: European steel and power plants (Thyssenkrupp, Enel) purchase YL-PASP-L1 for high-hardness circulating water, lifting concentration ratios from 3.0 to 5.5, saving 1.2 million tons of water annually and cutting equipment cleaning frequency by 75%.

2. Agriculture: Exported to Spain, France and Australia for grape and citrus cash crops. YL-PASP-M2 boosts medium and trace element absorption by 30% and reduces physiological crop diseases, certified as a "Green Chelating Agent" by the European Agricultural Association.

3. Coatings & Papermaking: Supplies coating manufacturers in Turkey and Russia. YL-PASP-H3 improves pigment dispersion and coating weather resistance by 20%; for European paper mills, it reduces fiber loss and boosts paper strength by 15%.

Authoritative Accreditations (International + Domestic)

· International Certifications: EU REACH registration, ISO9001 / ISO14001, OHSAS18001, US TSCA Inventory Listing.

· Domestic Qualifications: National High-Tech Enterprise, Co-formulator of the HG/T3822-2020 industry standard, China Environmental Label Product Certification.

· Technical Recognition: Self-developed "Gradient Polymerization – Controlled Depolymerization" technology delivers precise molecular weight regulation (PDI ≤1.2), jointly certified by Nankai University and Beijing University of Chemical Technology.

IV. Xietong Chemical (Hebei): Industry Standard Setter, Classic Grades Globally Popular, Filed with Official Agencies Worldwide

Core Mainstream Grades

· XT-PASP-1: 40% Liquid Sodium PASP (General Industrial Grade), cost-effective, preferred by small and medium enterprises globally.

· XT-PASP-2: 95% PASP Powder (General Agricultural / Daily Chemical Grade), powerful chelation compatible with compound and water-soluble fertilizers.

· XT-PASP-3: Modified PASP (Gypsum Retarder / Soil Conditioner Grade), tailored for construction material and soil improvement applications.

Global Market Feedback (Core Highlights)

1. General Industrial Market: Exported to India, Indonesia, Brazil, Russia and other emerging markets. XT-PASP-1 captures over 60% of local PASP market share via cost efficiency and stable performance, listed as a "Standard Scale Inhibitor" by the Indian Water Treatment Association.

2. Agriculture: Widely adopted in Australia, New Zealand and South Africa for pastures and orchards. XT-PASP-2 improves fertilizer utilization by 25% and cuts chemical fertilizer dosage by 20%, filed for agricultural import certification by South Africa’s Ministry of Agriculture.

3. Construction Materials: Supplies gypsum manufacturers in Turkey and the Middle East. XT-PASP-3 accelerates gypsum setting by 20% and boosts structural strength, covering over 80% of gypsum plants across the Middle East.

Authoritative Accreditations (International + Domestic)

· International Certifications: EU REACH registration, US TSCA Inventory Listing, Cosmetic Ingredient Inventory Listing, ISO9001 / ISO14001.

· Domestic Qualifications: Primary Formulator of the HG/T3822-2020 industry standard, National Key New Product (Recognized 2004), Standing Director Unit of the Biostimulant Committee under the China Inorganic Salts Industry Association.

· Historical Endorsement: Partnered with Tianjin University to realize domestic PASP industrialization in 2000, filling a national technology gap; led the drafting of the industry standard in 2005, laying the foundation for China’s PASP industry.

V. Xintai Water Treatment (Shandong): Full Industrial Chain Support, Cost-Effective Grades Deeply Cultivated in Global Emerging Markets

Core Mainstream Grades

· XT-PASP-100: 40% Liquid Sodium PASP (Economical Industrial Grade), scale inhibition rate ≥95%, suited for small-to-medium circulating water systems.

· XT-PASP-200: PASP Compound Scale Inhibitor (PASP + PBTCA Blend, High-Temperature & High-Hardness Water Grade), heat-resistant up to 90°C.

· XT-PASP-300: Oilfield-Specific PASP (High-Molecular-Weight), for oilfield reinjection water and fracturing fluid dispersants.

Global Market Feedback (Core Highlights)

1. Emerging Industrial Markets: Exported to Southeast Asia, the Middle East and South America. XT-PASP-100 delivers equivalent performance at prices 30% lower than European and American alternatives; exports to Vietnam and Malaysia rose 45% year-on-year in 2025.

2. Oilfield Sector: Participated in major projects including Saudi Yanbu Petrochemical and Iraq Basra Oilfield. XT-PASP-300 replaces imported chemicals with a ≥99% scale inhibition rate, enabling 18-month scale-free system operation, earning unanimous praise from Middle Eastern EPC contractors.

3. Water Treatment Engineering: Supplies chemical agents for municipal sewage and reclaimed water reuse projects across Southeast Asia. XT-PASP-200 adapts to high-hardness, high-salinity water, with a 100% project acceptance pass rate and over 50 long-term cooperative clients.

Authoritative Accreditations (International + Domestic)

· International Certifications: EU REACH registration, ISO9001 / ISO14001, US TSCA Inventory Listing.

· Domestic Qualifications: Vice Chairman Unit of the China Industrial Water Treatment Association, Provincial Enterprise Technology Center, Chemical Industry "Quality Trustworthy Enterprise".

· Project Endorsement: Supplied chemical agents for 12 large international water treatment EPC projects from 2024 to 2025, passing strict client performance testing and certification.

VI. Comparative Core Advantages of the Five Brands & Purchasing Recommendations

At-a-Glance Core Advantages

· Taihe Technology: Largest production capacity + leading high-purity technology; ideal for semiconductor, pharmaceutical and large-scale high-end industrial projects.

· Fumiao Technology: Bio-based core strengths + dual agricultural & oilfield expertise; most comprehensive green certifications, suited for organic agriculture and eco-friendly oilfield projects.

· Yuanlian Chemical: Precise molecular weight control + superior stability; optimized for extreme high-hardness / high-temperature working conditions and high-end agricultural projects.

· Xietong Chemical: Industry standard originator + optimal cost performance; ideal for general global industrial, agricultural and construction material markets with cost-sensitive budgets.

· Xintai Water Treatment: Full industrial chain integration + deep emerging market presence; suited for small-to-medium industrial and oilfield projects in emerging economies.

Purchasing Guidance

· High-End Projects (Semiconductors / Pharmaceuticals / Large-Scale Industry): Prioritize high-purity grades from Taihe Technology.

· Organic Agriculture / Eco-Friendly Oilfield Projects: Prioritize bio-based grades from Fumiao Technology.

· Extreme Working Conditions (High Hardness / High Temperature): Prioritize precise molecular weight grades from Yuanlian Chemical.

· General Markets / Cost-Sensitive Projects: Prioritize classic grades from Xietong Chemical.

· Emerging Markets / Small-to-Medium Projects: Prioritize cost-effective grades from Xintai Water Treatment.

If you require more authentic, objective information on multiple leading Chinese PASP brands, please contact HiSiaddi customer service.

PASP: Production Processes, Supply Stability and Key Performance Indicators of China’s Five Leading Brands

As a new foreign trade service provider driven by dual engines of technology transformation and foreign trade, HiSiaddi has built a "1+2+3+4=1" service system and can supply original products from multiple well-known PASP brands.

As an R&D-oriented foreign trade service provider, HiSiaddi does not only promote a single manufacturer’s products. We objectively analyze multiple export-competitive leading Chinese PASP brands and share their production processes, supply stability and key indicators, as well as the downstream procurement impacts of these core factors, to help buyers make efficient, secure purchasing decisions.

If you require more authentic, objective information on multiple leading Chinese PASP brands, please contact HiSiaddi customer service.

I. Taihe Technology (Shandong): Dual Processes of Maleic Anhydride Large-Scale Production & High-Purity Refining, Zero Supply Interruptions as Global Capacity Leader

(I) Production Processes for Mainstream Grades: Dual Layout of Mass Production and High-End Manufacturing

1. TH-PASP-101 (40% Liquid Sodium PASP, General Industrial Grade): Maleic Anhydride – Ammonia Aqueous Thermal Polycondensation (Mainstream Maleic Anhydride Route)

o Process Flow: Maleic anhydride + ammonia water → salt formation → high-pressure thermal polymerization at 200°C → polysuccinimide (PSI) generation → hydrolysis with NaOH → concentration & decolorization → finished product

o Core Advantages: Low raw material costs (bio-based feedstock <10%), large single-batch capacity (50 m³ reactors, 200 tons per batch), easy waste treatment, suited for 10,000-ton annual mass production.

2. TH-PASP-202 (95% Potassium PASP Powder, Premium Agricultural Grade): Maleic Anhydride Route + Potassium Salt Displacement Refining

o Process Flow: Maleic anhydride synthesis of sodium PASP → membrane filtration impurity removal → sodium ion displacement via KOH → spray drying → high-purity powder

o Core Advantages: Purity raised to 95%, sodium ion residue <0.5%, compatible with premium liquid fertilizers to avoid soil compaction.

3. TH-PASP-303 (High-Purity Modified PASP, Semiconductor / Pharmaceutical Grade): Bio-Based L-Aspartic Acid Thermal Polycondensation + Precision Membrane Separation

o Process Flow: Fermentation-derived L-aspartic acid → solvent-free vacuum thermal polycondensation at 180°C → PSI intermediate → hydrolysis → nanofiltration / reverse osmosis refining → high-purity finished product

o Core Advantages: Purity ≥98%, residual metal ions ≤5 ppm, PDI ≤1.15, zero organic solvent residue, compliant with semiconductor ultrapure water standards.

(II) Supply Stability: World’s Largest Capacity + Dual Production Base Backup, 7–10 Day Delivery Cycles

· Production Scale: Total annual capacity of 22,000 tons (20%+ of global share), dual manufacturing bases in Zaozhuang (Shandong) and Yancheng (Jiangsu), single line annual capacity 12,000 tons.

· Operating Rate: Steady 90%–95% annual utilization; full-load production during peak seasons (agricultural fertilizer preparation / EU-US water treatment tender cycles) with no supply disruptions from scheduled maintenance.

· Inventory Guarantee: 5,000 tons permanent stock of general-grade TH-PASP-101; 1,000 tons permanent stock of high-end TH-PASP-202 / 303, capable of fulfilling emergency single-batch orders up to 500 tons.

· Delivery Record: 100% on-time delivery for global orders in 2025; average 8-day lead time for European and Southeast Asian clients with zero delivery delays.

(III) Key Performance Indicators (Strong Batch Consistency, Fluctuation ≤3%)

表格

(IV) Core Impacts on Downstream Buyers

1. Industrial Water Treatment Clients: Batch-to-batch scale inhibition fluctuation ≤2% for TH-PASP-101, delivering stable ≥98% scale inhibition under high-hardness water (hardness >500 mg/L) to prevent equipment scaling shutdowns; 8%–10% lower per-ton water chemical costs vs. small-scale manufacturers, ideal for large circulating water systems.

2. Premium Agricultural Fertilizer Clients: TH-PASP-202 potassium content ≥28%, 95%+ chelation efficiency for calcium, magnesium and zinc ions, capable of directly replacing imported chelated micronutrient fertilizers; improved finished fertilizer stability extending shelf life to 24 months.

3. High-End Electronics / Pharmaceutical Clients: TH-PASP-303 residual metal ions ≤5 ppm with robust batch uniformity, eliminating ion contamination risks in ultrapure water systems; compliant with GMP and semiconductor cleanroom standards to support long-term partnerships with top-tier high-end clients.

II. Fumiao Technology (Jiangsu): Bio-Based Thermal Polycondensation & Fermentation Coupling Process, Most Comprehensive Green Certifications, Optimized for Agriculture & Oilfields

(I) Production Processes for Mainstream Grades: Bio-Based Route as Core, Maximized Green Performance

1. FM-PASP-A1 (40% Liquid Bio-PASP, Agricultural Grade): Bio-Fermentation & Thermal Polycondensation Coupling Process (100% Bio-Based)

o Process Flow: Corn starch fermentation → L-aspartic acid (purity ≥99%) → solvent-free vacuum thermal polycondensation at 170°C → PSI → hydrolysis → activated carbon decolorization → finished product

o Core Advantages: 100% bio-based feedstock with zero petrochemical raw materials, 28-day biodegradability ≥92%, eligible for ECOCERT organic agriculture certification.

2. FM-PASP-B2 (PASP-PESA Compound Agent, Oilfield / Seawater Desalination Grade): Bio-Based PASP + PESA Catalytic Blending Process

o Process Flow: Bio-based PASP (molecular weight 8,000–15,000) + Polyepoxysuccinic Acid (PESA) → catalytic blending → high-temperature stabilization treatment → finished product

o Core Advantages: Heat-resistant up to 120°C, salinity tolerance up to 10%, 63% lower COD discharge, suited for high-temperature reinjection water in Middle Eastern oilfields.

3. FM-PASP-C3 (Low-Metal PASP, Daily Chemical / Electronics Grade): Bio-Based Thermal Polycondensation + Ion Exchange Refining Process

o Process Flow: Bio-based L-aspartic acid thermal polycondensation → hydrolysis → strong acid cation exchange resin metal ion removal → concentration → finished product

o Core Advantages: Heavy metal residue ≤1 ppm, low odor, light color (APHA <50), compatible with sensitive skin and infant care detergents.

(II) Supply Stability: 10,000-Ton Bio-Based Production Line + Flexible Manufacturing, No Supply Shortages During Peak Seasons

· Production Scale: Total annual capacity of 15,000 tons, China’s first dedicated 10,000-ton bio-based PASP production line with single line annual capacity 10,000 tons.

· Operating Rate: Bio-based line maintains steady 95%+ full-load utilization; flexible blending lines enable rapid switching between oilfield and daily chemical grades.

· Inventory Guarantee: 3,000 tons permanent peak-season stock of agricultural FM-PASP-A1; 1,500 tons permanent stock of oilfield FM-PASP-B2, supporting long-term framework orders for major Middle Eastern and Southeast Asian clients.

· Delivery Record: Average 10-day lead time for agricultural clients in Vietnam and Thailand, 12 days for Middle Eastern oilfield clients, with a 92% repeat order rate.

(III) Key Performance Indicators (High Bio-Based Purity, Leading Environmental Metrics)

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(IV) Core Impacts on Downstream Buyers

1. Organic Agriculture / Biostimulant Clients: 100% bio-based FM-PASP-A1 complies with EU organic farming standards, enabling finished fertilizer products to carry organic certification labels and unlock 30%–50% premium pricing; field trials deliver 10%–15% crop yield growth with high farmer repeat purchase rates.

2. Eco-Friendly Oilfield Chemical Clients: Heat and salinity resistant FM-PASP-B2 cuts oilfield wastewater COD emissions by 63% after replacing traditional polyacrylate chemicals, meeting strict Middle Eastern environmental standards and enabling access to supply chains of Saudi Aramco and ADNOC.

3. Natural Daily Chemical Clients: Low-metal, low-odor FM-PASP-C3 fits sensitive skin care formulations, delivering non-irritating laundry products free of fabric yellowing; compliant with EU ECOCERT natural personal care certification to strengthen brand competitiveness.

III. Yuanlian Chemical (Shandong): Gradient Polymerization & Controlled Depolymerization Process, Precisely Tunable Molecular Weights, Superior Stability Under Extreme Working Conditions

(I) Production Processes for Mainstream Grades: Precision Molecular Weight Control Technology, Optimized for Extreme Operating Conditions

1. YL-PASP-L1 (Low-Molecular-Weight Sodium PASP, High-Hardness Water Grade): Maleic Anhydride Route + Gradient Polymerization Process

o Process Flow: Maleic anhydride + ammonia water → salt formation → three-stage temperature gradient thermal polymerization at 180°C → PSI → hydrolysis → precise molecular weight locking (3,000–5,000 Da) → finished product

o Core Advantages: Molecular weight deviation ≤±300 Da, PDI ≤1.2, ≥98% scale inhibition under ultra-high-hardness water (hardness >800 mg/L).

2. YL-PASP-M2 (Medium-Molecular-Weight Potassium PASP, Agricultural / Seawater Desalination Grade): Bio-Based L-Aspartic Acid Thermal Polycondensation + Controlled Depolymerization Process

o Process Flow: L-aspartic acid → vacuum thermal polycondensation → high-molecular-weight PSI → controlled depolymerization (precision chain scission) → hydrolysis → potassium salt displacement → locked molecular weight 8,000–15,000 Da → finished product

o Core Advantages: Extremely narrow molecular weight distribution, high chelating activity boosting medium and trace element absorption by 30%, suited for cash crops including grapes and citrus.

3. YL-PASP-H3 (Customized PASP Powder, Coating / Papermaking Grade): Maleic Anhydride Route + Membrane Filtration Fractionation Process

o Process Flow: Maleic anhydride synthesis of PASP → hydrolysis → nanofiltration membrane fractionation (screening targeted molecular weights) → spray drying → ≥95% purity powder

o Core Advantages: Molecular weight precisely matched to coating dispersion requirements, lifting pigment dispersibility and coating weather resistance by 20%.

(II) Supply Stability: 10,000-Ton Precision Molecular Weight Production Line, Strong Customized Order Delivery Capacity

· Production Scale: Total annual capacity of 12,000 tons, dedicated gradient polymerization & controlled depolymerization production line with single line annual capacity 8,000 tons.

· Operating Rate: Steady 85%–90% annual utilization; flexible manufacturing for customized orders enabling rapid response to special molecular weight requirements.

· Inventory Guarantee: 2,000 tons permanent stock of standard molecular weight YL-PASP-L1 / M2; customized grades scheduled within 7 days with delivery within 15 days.

· Delivery Record: Average 10-day lead time for European steel and power plant clients in 2025; 98% on-time delivery rate for customized orders.

(III) Key Performance Indicators (Precise Molecular Weight, Minimal Batch Fluctuation)

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(IV) Core Impacts on Downstream Buyers

1. High-Hardness Industrial Water Treatment Clients: Precisely calibrated molecular weight of YL-PASP-L1 delivers consistent scale inhibition under high-hardness conditions, cutting equipment cleaning frequency by 75% and maintenance costs by 40%; uniform batch performance eliminates system failures caused by chemical agent inconsistency.

2. Cash Crop Fertilizer Clients: High chelating activity of YL-PASP-M2 boosts calcium, magnesium and zinc absorption by 30%, reducing physiological crop disorders (grape cracking, citrus magnesium-deficient yellowing); finished fertilizers command a 20%–40% price premium.

3. Coating & Papermaking Clients: YL-PASP-H3 molecular weight optimized for dispersion eliminates pigment agglomeration and improves coating weather resistance; reduces fiber loss in papermaking and raises paper strength by 15%, enhancing finished product quality consistency.

IV. Xietong Chemical (Hebei): Traditional Maleic Anhydride Route + Industry Standard Production Process, Top Cost Performance for General Global Markets

(I) Production Processes for Mainstream Grades: Classic Maleic Anhydride Route, Standardized Mass Production, Optimal Cost Efficiency

1. XT-PASP-1 (40% Liquid Sodium PASP, General Industrial Grade): Classic Maleic Anhydride – Ammonia Thermal Polycondensation (Industry Standard HG/T3822-2020 Prescribed Process)

o Process Flow: Maleic anhydride + ammonia water → atmospheric salt formation → thermal polymerization at 190°C → PSI → hydrolysis with NaOH → simple decolorization → finished product

o Core Advantages: Mature process with low equipment investment, 20%–25% lower per-ton production costs vs. bio-based routes, suited for large-scale general-grade mass manufacturing.

2. XT-PASP-2 (95% PASP Powder, General Agricultural / Daily Chemical Grade): Maleic Anhydride Route + Spray Drying Process

o Process Flow: Maleic anhydride synthesis of sodium PASP → concentration → spray drying → 95% purity powder

o Core Advantages: Optimal cost performance, fast dissolution compatible with compound and water-soluble fertilizers, preferred by small and medium enterprises globally.

3. XT-PASP-3 (Modified PASP, Gypsum Retarder / Soil Conditioner Grade): Maleic Anhydride Route + Inorganic Modification Process

o Process Flow: Maleic anhydride-derived PASP → blending with gypsum retardants → modification treatment → finished product

o Core Advantages: Optimized for construction gypsum retardation and saline-alkali soil improvement, shortening setting time by 20% and boosting soil fertility.

(II) Supply Stability: Pioneer Industry Standard Manufacturer, Ample Capacity for Global General Market Coverage

· Production Scale: Total annual capacity of 10,000 tons, China’s earliest commercial PASP production line (commissioned 2000) with single line annual capacity 6,000 tons.

· Operating Rate: Steady 80%–85% annual utilization; priority production scheduling for general-grade orders, full-load operation during peak water treatment seasons in India and Brazil.

· Inventory Guarantee: 4,000 tons permanent stock of XT-PASP-1; 1,500 tons permanent stock of XT-PASP-2, supporting large-volume orders for emerging markets including India, Indonesia and Brazil.

· Delivery Record: Average 12-day lead time for emerging market clients in 2025, stable pricing with no sharp fluctuations and an 88% client repeat order rate.

(III) Key Performance Indicators (Compliant with Industry Standards, Optimal Cost Performance)

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(IV) Core Impacts on Downstream Buyers

1. General Industrial Water Treatment Clients (India / Indonesia / Brazil): XT-PASP-1 meets full industry standard specifications with equivalent performance at prices 30% lower than European and American alternatives, suited for small-to-medium circulating water and municipal sewage systems delivering the lowest per-ton water chemical costs and unrivaled cost performance.

2. Small & Medium Fertilizer Manufacturers (Australia / New Zealand / South Africa): Fast-dissolving, highly compatible XT-PASP-2 blends seamlessly with compound and water-soluble fertilizers; 1%–3% dosing lifts fertilizer utilization by 25% with low raw material costs, enabling small fertilizer producers to launch mid-to-high-end product lines.

3. Construction Material & Soil Improvement Clients (Turkey / Middle East): XT-PASP-3 delivers reliable performance for gypsum retardation and saline-alkali soil remediation, cutting procurement costs for large-scale infrastructure and agricultural improvement projects across the Middle East.

V. Xintai Water Treatment (Shandong): Maleic Anhydride Route + Compound Modification Process, Full Industrial Chain Support, Deeply Cultivated Emerging Markets

(I) Production Processes for Mainstream Grades: Maleic Anhydride Route as Base, Compound Modification for Diversified Application Scenarios

1. XT-PASP-100 (40% Liquid Sodium PASP, Economical Industrial Grade): Maleic Anhydride Route + Simplified Refining Process

o Process Flow: Maleic anhydride + ammonia water → thermal polymerization → PSI → hydrolysis → simple filtration → concentration → finished product

o Core Advantages: Lowest production costs, short manufacturing cycles (3 days per batch), suited for small-to-medium circulating water and municipal sewage systems.

2. XT-PASP-200 (PASP Compound Scale Inhibitor, High-Temperature & High-Hardness Water Grade): Maleic Anhydride-Derived PASP + PBTCA Blending Process

o Process Flow: PASP (molecular weight 5,000–8,000) + PBTCA (organophosphorus agent) → blending → stabilization treatment → finished product

o Core Advantages: Heat-resistant up to 90°C, compatible with high-hardness water (hardness 600 mg/L), ≥96% scale inhibition rate optimized for high-temperature, high-hardness water conditions in Southeast Asia.

3. XT-PASP-300 (Oilfield-Specific PASP, High-Molecular-Weight Grade): Maleic Anhydride Route + High-Molecular-Weight Polymerization Process

o Process Flow: Maleic anhydride + ammonia water → extended polymerization duration → high-molecular-weight PSI (20,000–30,000 Da) → hydrolysis → finished product

o Core Advantages: High molecular weight delivering superior dispersing power for oilfield reinjection water and fracturing fluid dispersants, ≥99% scale inhibition rate.

(II) Supply Stability: Full Industrial Chain Integration, Flexible Capacity, Fast Delivery to Emerging Markets

· Production Scale: Total annual capacity of 10,000 tons, self-sufficient upstream raw materials (maleic anhydride, ammonia water) delivering full industrial chain cost control and supply security; single line annual capacity 7,000 tons.

· Operating Rate: Steady 85%–90% annual utilization; flexible blending lines enable rapid grade switching to meet diversified demand across Southeast Asia and the Middle East.

· Inventory Guarantee: 3,000 tons permanent stock of XT-PASP-100; 1,000 tons permanent stock of XT-PASP-300, delivering 7–10 day lead times for Vietnamese and Malaysian clients.

· Delivery Record: 45% year-on-year export growth to emerging markets in 2025; supplied chemical agents for major oilfield projects in Saudi Arabia and Iraq with a 100% project acceptance pass rate.

(III) Key Performance Indicators (Balanced Cost & Performance for Emerging Market Conditions)

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(IV) Core Impacts on Downstream Buyers

1. Small & Medium Industrial Clients in Southeast Asia: Lowest-cost XT-PASP-100 meets all performance standards for SME circulating water and municipal sewage systems, cutting per-ton water chemical costs by 15% vs. local alternatives with fast delivery and zero supply disruption risks.

2. High-Temperature & High-Hardness Water Treatment Clients: Heat and hardness resistant XT-PASP-200 delivers stable scale inhibition under Southeast Asian and Middle Eastern high-temperature conditions, eliminating system scaling and cutting equipment maintenance costs by 30%.

3. Small & Medium Oilfield EPC Contractors: High-molecular-weight XT-PASP-300 provides powerful dispersing performance for oilfield reinjection and fracturing fluids; replacing imported chemicals slashes project costs by 25% and passes strict owner testing to enable long-term cooperation.

VI. Summary of Core Differences Between the Five Brands & Purchasing Decision Reference

(I) Process Differences: Determine Product Positioning and Production Costs

· Taihe Technology: Large-scale maleic anhydride production + high-purity bio-based refining, balancing cost and high-end performance for full-spectrum application scenarios.

· Fumiao Technology: 100% bio-based thermal polycondensation, strongest green credentials, optimized for organic agriculture and eco-friendly oilfield projects.

· Yuanlian Chemical: Gradient polymerization & controlled depolymerization, precise molecular weight control for extreme working conditions and premium agricultural applications.

· Xietong Chemical: Classic standardized maleic anhydride process (industry standard), lowest production costs for general, cost-sensitive market segments.

· Xintai Water Treatment: Maleic anhydride route + compound modification, full industrial chain integration tailored for emerging markets and small-to-medium projects.

(II) Supply Stability: Determine Delivery Reliability

· Taihe Technology: Dual production bases + global maximum capacity, most reliable supply, top choice for emergency bulk orders.

· Fumiao Technology: Dedicated bio-based production line, stable order fulfillment for agricultural and oilfield clients.

· Yuanlian Chemical: Specialized precision molecular weight production line, strong customized order delivery capability.

· Xietong Chemical: Long-established manufacturing capacity, stable mass-volume delivery for general global markets.

· Xintai Water Treatment: Full vertical industrial chain, fastest delivery lead times for emerging markets.

(III) Key Performance Indicators: Directly Impact Downstream Finished Product Quality

· High-End Metrics (Purity / Molecular Weight Precision): Taihe Technology > Yuanlian Chemical > Fumiao Technology > Xietong Chemical > Xintai Water Treatment

· Green Metrics (Bio-Based Content / Biodegradability): Fumiao Technology > Taihe Technology > Yuanlian Chemical > Xietong Chemical > Xintai Water Treatment

· Cost Performance (Cost vs. Functional Output): Xietong Chemical > Xintai Water Treatment > Yuanlian Chemical > Fumiao Technology > Taihe Technology

(IV) Purchasing Decision Guidance

· High-End Projects (Semiconductors / Pharmaceuticals / Large-Scale Industry): Select high-purity grades from Taihe Technology for stable performance, full compliance and comprehensive international certifications.

· Organic Agriculture / Eco-Friendly Oilfield Projects: Select bio-based grades from Fumiao Technology for complete green certification and proven field performance.

· Extreme Working Conditions (High Hardness / High Temperature): Select precise molecular weight grades from Yuanlian Chemical for consistent performance and full customization support.

· General Markets / Cost-Sensitive Procurement: Select classic grades from Xietong Chemical for optimal cost performance and full industry standard compliance.

· Emerging Markets / Small-to-Medium Scale Projects: Select economical grades from Xintai Water Treatment for fast delivery and localized condition compatibility.

If you require more authentic, objective information on multiple leading Chinese PASP brands, please contact HiSiaddi customer service.

PASP: Key Factors Buyers Should Consider When Purchasing Based on HiSiaddi’s Market Experience

As a new-type foreign trade service provider driven by both technology commercialization and foreign trade services, HiSiaddi has established the "1+2+3+4=1" service system and can supply original factory sources of PASP from multiple well-known brands. As a foreign trade enterprise with R&D capabilities, HiSiaddi will analyze key purchasing considerations and critical indicators from a professional perspective to ease buyers’ selection concerns.

If you require more professional and in-depth analysis on PASP selection, please contact HiSiaddi customer service.

I. Sourcing Polyaspartic Acid (PASP) from China: Core Full-Process Considerations

Commercially available PASP mainly exists as homogeneous brownish-yellow to reddish-brown aqueous solutions; high-purity deep-processed products are also available as solid powder or granules. Its core performance, molecular weight distribution, impurity content, biodegradability and storage stability are determined by raw material quality, polymerization and hydrolysis processes, desalination, decolorization, concentration and refining procedures. As a green high-molecular fine chemical, PASP covers water treatment, oilfield, daily chemical, agriculture and other sectors. Environmental regulations, water contact safety, oilfield chemical and agricultural chemical standards vary widely across countries. Both liquid and solid formulations are regulated as ordinary chemicals with no flammability, explosion risk or strong corrosivity. Purchasing decisions cannot rely solely on unit price and solid content comparison; comprehensive evaluation combining application scenarios, regulatory requirements and long-term operational performance is necessary.

(I) Compliance Qualification Verification: Align with Global Regulations to Ensure Smooth Customs Clearance and Legal End-Use

PASP covers a wide range of applications with distinct access standards, restricted substances and mandatory testing items for each field. Complete compliance documents serve as a prerequisite for cross-border customs clearance, legal project operation and environmental risk mitigation. First, match special testing and qualification documents based on end-use scenarios.

· For drinking water auxiliary circulating water and domestic building water systems: Control standards are extremely stringent. Exports to the EU, North America, Japan, South Korea and Southeast Asia require water contact safety test reports with strict limits on heavy metals, toxic residues and irritants, complying with auxiliary agent specifications for domestic water.

· For industrial circulating water, reverse osmosis systems and municipal wastewater: Prioritize compliance with local phosphorus-ban environmental regulations, and provide phosphorus-free certificates, biodegradation rate and ecotoxicity test reports to meet wastewater discharge standards.

· For oilfield reinjection water and downhole treatment agents: Attach supporting oilfield chemical access documents to verify tolerance to high salinity, formation compatibility and marine/soil ecological safety.

· For daily cleaning and personal care auxiliaries: Comply with REACH regulations and SVHC screening requirements, and provide skin irritation and heavy metal test reports.

· For fertilizer synergists and agricultural foliar additives: Meet local agricultural chemical standards and verify soil compatibility and crop safety.

Second, prepare complete cross-border customs clearance and transportation documents. Neither liquid nor solid PASP is classified as hazardous chemicals and shall be shipped as general goods. Suppliers must provide multi-lingual SDS safety data sheets and chemical classification identification reports, which are mandatory documents for global sea, air and land customs inspections. General customs clearance documents include certificates of origin, batch-by-batch COA quality inspection reports and production traceability documents. For environmentally regulated regions, supplementary biodegradation, phosphorus-free and total phosphorus test reports are required; for water contact and daily chemical markets, additional hygiene safety, toxicology and irritation test reports are needed; for oilfield and agricultural clients, supporting data on working condition adaptability and ecological safety shall be provided.

Finally, prioritize suppliers with long-term export track records in target regions, and verify the qualifications and traceability of third-party testing institutions issuing reports. Excessive impurities, substandard biodegradation rates or missing compliance documents may directly lead to cargo detention at customs, project shutdowns and environmental penalties. Full qualification verification must be completed in advance.

(II) Raw Materials & Production Processes: Lock Polymerization & Refining Procedures to Stabilize Molecular Weight and Impurity Profiles

PASP’s scale and corrosion inhibition efficiency, molecular weight distribution, salt content, monomer residues, color and odor are determined by upstream raw materials, thermal polycondensation polymerization, hydrolysis, desalination and decolorization core procedures. These factors also distinguish high-purity eco-grade, general industrial-grade, special oilfield-grade and agricultural-grade products.

1. Verify upstream raw material quality. Premium products adopt high-purity aspartic acid as polymerization monomers with high monomer purity and minimal impurities, delivering high polymerization conversion rates, low residual monomers, inorganic salts and low-molecular by-products, as well as superior scale inhibition and biodegradation performance. Low-end products utilize crude industrial materials or recycled monomers with incomplete reactions, resulting in high salt and residual monomer levels. They degrade operational performance and easily cause secondary water pollution, making them unsuitable for high-environmental-standard areas, water contact and daily chemical applications. When purchasing high-grade products, buyers may request raw material purity test certificates from suppliers.

2. Confirm polymerization and post-refining processes. The mainstream industrial route adopts thermal polycondensation of aspartic acid followed by alkaline hydrolysis. Crude synthetic products contain inorganic salts, unreacted monomers, colored impurities and low polymers.

o High-purity eco/water-contact grade: Equipped with multi-stage desalination, vacuum concentration, activated carbon decolorization and precision filtration combined processes, drastically reducing salt content, residual monomers and colored impurities, delivering narrow molecular weight distribution and qualified biodegradation rates for strict environmental and water contact scenarios.

o General industrial grade: Adopts conventional concentration and simple filtration with effective components meeting standards and impurities controlled within industrial allowable ranges, serving as the mainstream model on the market.

o Special oilfield grade: Optimized molecular weight range to strengthen salt tolerance and dispersibility.

o Agricultural grade: Simplified deep refining focusing on cost and fertilizer compatibility. Strictly differentiate product grades during procurement; prohibit low-grade products being falsely marketed as high-purity eco-grade. Formal production lines adopt closed automated reaction equipment with full temperature and pressure control, resulting in minimal batch-to-batch fluctuations in molecular weight, solid content and color. High-grade products are produced in independent partitioned production lines to avoid cross-contamination.

3. Evaluate quality control, production capacity and inventory capacity. PASP is a continuous mass-produced chemical with sufficient annual stable supply from leading domestic manufacturers. Request consecutive batches of COAs, gel chromatography molecular weight distribution data, residual monomer and salt content test results. Focus on fluctuation ranges of solid content, molecular weight, molecular weight distribution, pH, density, salt content, residual monomer and biodegradation rate to judge the rigor of quality control. For long-term framework cooperation, negotiate fixed raw material sources, polymerization parameters and refining processes to guarantee consistent performance across batches. Prioritize original manufacturers with complete integrated polymerization, desalination and decolorization production lines; trading companies often blend products of different molecular weights and grades, directly impairing operational performance. Also request stability data under high-low temperature cycles and long-term static storage, as well as performance under different water qualities to adapt to ocean shipping, global temperature zones and diverse storage environments.

(III) Grade, Specification & Formulation Matching: Select by Solid Content and Molecular Weight to Avoid Parameter Mismatch

PASP products are primarily categorized by solid content, molecular weight range, physical form and application grade. Viscosity, scale inhibition capacity, corrosion inhibition effect, water solubility and compatibility vary significantly with different parameters; incorrect model selection may trigger scale inhibition failure, system salt accumulation, substandard biodegradation and formulation delamination.

1. Distinguish mainstream solid content specifications.

o Liquid mainstream grades: 40% and 50% solid content. 40% grade features low viscosity, excellent fluidity and resistance to thickening at low temperatures, suitable for small-scale equipment, automatic dosing systems and long-distance transportation. The highly concentrated 50% grade cuts logistics and warehousing costs but has higher viscosity, ideal for large water plants and centralized oilfield dosing. Custom high-concentration formulations up to 60% are available for chemical compounding factories.

o Solid powder/granule formulations: Effective content ≥90%, occupying minimal storage space, lowering transportation costs and extending shelf life, suited for low-temperature and arid regions as well as formulation deep processing scenarios. Clearly specify the nominal solid content and mutually agreed fluctuation range in contracts.

2. Differentiate molecular weight ranges and corresponding applications.

o Low molecular weight: Outstanding chelating and dispersing capacity, widely used in industrial cleaning, daily chemical auxiliaries and fertilizer synergists.

o Medium molecular weight: Balanced scale inhibition performance, the mainstream choice for industrial circulating water, boiler water and conventional reverse osmosis systems.

o High molecular weight: Superior corrosion inhibition and auxiliary flocculation effects, mainly applied in oilfield reinjection water and high-hardness complex water systems. Precisely select molecular weight ranges according to working conditions; arbitrary mixing is prohibited.

3. Classify application grades and applicable scenarios.

o High-purity eco-grade: Low salt, low residual monomers, high biodegradation rate, suitable for phosphorus-ban regions in Europe and America, drinking water auxiliary systems and high-end pure water projects.

o General industrial grade: Cost-effective, widely adopted in conventional industrial circulating water and wastewater systems.

o Special oilfield grade: Optimized molecular weight and salt tolerance for high-salinity formation water.

o Agricultural grade: Focused on fertilizer compatibility for agricultural synergist applications.

o Daily chemical grade: Low odor, low irritation and qualified heavy metal limits for cleaning and personal care products. No cross-scenario substitution is allowed between grades.

4. Confirm physical properties and packaging specifications. Qualified liquid PASP is a homogeneous, transparent brownish-yellow to reddish-brown liquid without delamination, turbidity or obvious suspended solids. Solid products are pale yellow to off-white powder/granules free of caking and impurities. Mainstream bulk liquid packaging includes 200kg plastic drums and 1000kg IBC totes; solids adopt 25kg PE-lined fiber drums; small batches and samples use 25kg plastic drums. For customized requirements such as special molecular weight, ultra-low salt content and tailored color, confirm minimum order quantities and production lead times in advance. Send samples for small-scale testing of scale inhibition, corrosion inhibition, salt resistance and formulation stability before placing bulk orders.

(IV) Commercial Terms & Full-Link Cost Accounting: Balance Total Expenses for Liquid and Solid Formulations

Liquid bulk PASP and high-value solid formulations differ drastically in packaging, short-distance transportation, ocean freight and special testing costs. Cost accounting cannot rely solely on unit prices; full-link calculation combining trade modes and formulations is required.

1. Clarify quotation modes. Two mainstream options are FOB China Port and CIF Destination Port.

o FOB quotation covers goods, domestic transportation and standard packaging fees. International logistics, insurance and destination customs clearance are the buyer’s responsibility, ideal for large water groups, major environmental engineering firms, oilfield enterprises and deep-processing factories with dedicated chemical freight forwarders and year-round bulk stocking, delivering optimal overall costs.

o CIF quotation includes ocean freight, insurance, port miscellaneous and handling fees, with the supplier managing the full process for simplified operations, suitable for first-time cooperation, small-batch procurement and cross-border chemical distributors. Inquire about volume tiered pricing and annual long-term contract discounts to hedge price fluctuations of upstream monomer raw materials via price locking.

2. Negotiate settlement, delivery and quality dispute clauses. International trade commonly adopts T/T or irrevocable L/C settlement; agree on advance payment and balance settlement schedules based on cargo volume and cooperation credibility. Standard solid content and conventional molecular weight general-grade products are in stock with short lead times. High-purity eco-grade, custom molecular weight, solid formulations and tailored daily chemical/agricultural products require reserved cycles for production, refining and full-item testing. Define judgment criteria for quality disputes in contracts: formulate re-inspection, return, replacement and replenishment procedures for non-compliance including substandard solid content, excessive molecular weight deviation, elevated salt/residual monomer levels, liquid delamination and severe solid caking or misrepresented grades. Simultaneously specify reasonable ranges for normal liquid storage and transportation loss, minor color variation and slight solid caking to clearly allocate liabilities between both parties.

3. Confirm minimum order quantities and warehousing agreements. Factory bulk orders start with full drums/totes (liquid) and full drums (solid); distributors offer more flexible minimum order thresholds. Liquid PASP darkens faster under high temperatures and thickens at low temperatures; solid powder is highly hygroscopic and prone to caking in high-humidity environments. Agree on complimentary domestic storage periods to avoid long-term cargo storage in open-air, high-temperature, humid or frigid ports.

(V) Packaging, Storage & Transportation Control: Strengthen Protection for Liquid and Solid Formulations

Core risks for liquid PASP include leakage during long-distance bumpy transport, thickening at low temperatures and color darkening under high temperatures. Solid formulations mainly face moisture absorption, caking and dust contamination. With no fire or explosion hazards, the core control principles are hermetic sealing, ambient temperature storage and moisture/leakage prevention throughout the supply chain.

1. Implement formulation-specific packaging standards. Liquid products utilize thick brand-new plastic drums with double inner and outer lids paired with corrosion-resistant leak-proof gaskets and reinforced drum mouths. IBC totes feature sturdy frames and intact inner liners, with leakage testing performed drum-by-drum prior to delivery. Solid products adopt double-layer PE sealed inner bags plus thick fiber drums with tightly fastened lids to isolate water vapor and air. Uniform logistics labels are affixed to outer packaging: store at ambient temperature away from direct sunlight, prevent liquid congelation at low temperatures and protect solids from moisture. Packaging strength meets international ocean stacking and long-distance bumping transportation requirements.

2. Plan transportation modes and storage environments. Large-volume liquid cargo prioritizes ocean shipping in sealed containers maintained at ventilated ambient temperatures of 10–35°C. Avoid prolonged high-temperature cabin storage for summer tropical routes; utilize temperature-controlled containers for high-latitude cold regions in winter to prevent excessive liquid thickening. Solid cargo requires full moisture-proof covering during transit, with enhanced protection for rainy, coastal and high-humidity shipping lanes. Samples and urgent orders may be shipped by air following general chemical air freight regulations. Minimize transshipment times; repeated loading/unloading risks drum damage and leakage for liquids, and packaging rupture and moisture absorption for solids. Consider cargo insurance for high-value batches such as high-purity grades and solids to cover losses from leakage, moisture and contamination.

3. Allocate storage/transport liabilities and operational reminders. Suppliers are responsible for hermetic packaging and ambient dry warehousing prior to cargo departure. Upon arrival at the destination port, immediately transfer goods to indoor ambient-temperature dry warehouses. Remind operators: liquid thickening at low temperatures and slight solid caking are normal physical phenomena. Liquid recovers fluidity upon slow warming; gently breaking caked solids does not impair performance. Direct open-flame heating of liquid products is prohibited. Tightly seal drum lids immediately after each use to minimize contact with air and water vapor.

(VI) Technical Support & After-Sales Service: Assist Working Condition Commissioning to Resolve Scale/Corrosion Inhibition, Formulation Compatibility and Compliance Issues

PASP is frequently compounded with flocculants, biocides, corrosion inhibitors, fertilizers and other materials. Molecular weight, salt content and residual monomers directly impact scale/corrosion inhibition performance, system stability and environmental compliance. Professional technical services reduce on-site commissioning and operational risks.

1. Pre-sales application technical support. Suppliers provide samples, complete technical manuals and molecular weight distribution data, explaining dilution ratios, dosing rates and compounding schemes for products of different solid contents, molecular weights and formulations. Deliver solutions for on-site challenges including scale control, metal corrosion inhibition, performance failure in high-salinity water, formulation delamination and substandard biodegradation, while interpreting environmental, water contact, daily chemical and agricultural regulatory limits of target countries.

2. Post-delivery inspection coordination. Agree on unified sampling and testing standards. Buyers may independently test basic indicators such as solid content, pH and appearance, or entrust third parties to conduct full-item testing of molecular weight, salt content, residual monomers and biodegradation rates. Rapidly resolve discrepancies when measured indicators and physical properties fail to meet contractual standards per agreed procedures.

3. Document assistance and regulatory interpretation. Provide multi-lingual SDS, translated test reports and compliance statements on demand to assist buyers with local chemical registration, water/oilfield/agricultural market access and environmental audits. Simultaneously update global phosphorus-ban environmental and water treatment regulatory revisions.

II. Core Indicators for PASP Purchasing by Application Scenario

Based on mainstream global application sectors, six buyer categories are defined: high-purity eco & drinking water auxiliary water treatment, general industrial circulating water & wastewater, oilfield reinjection water, daily chemical & industrial cleaning, agricultural fertilizer synergist and cross-border chemical raw material distribution. Core quality control priorities aligned with international environmental, water treatment, oilfield, daily chemical and agricultural general standards are clarified for each category.

(I) High-Purity Eco & Drinking Water Auxiliary Water Treatment Buyers

Core priority: Stable solid content, narrow molecular weight distribution, ultra-low salt/residual monomers, high biodegradation rate, qualified heavy metal limits, fully phosphorus-free environmental safety with the strictest indicator control.

1. Solid content: Strictly comply with contractual values with minimal fluctuation for precise dosing concentration control.

2. Molecular weight & molecular weight distribution: Stable range and narrow distribution to guarantee consistent scale/corrosion inhibition performance.

3. Total phosphorus: Undetectable, compliant with global phosphorus-ban regulations.

4. Inorganic salts & residual monomers: Ultra-low limits to avoid system salt accumulation and secondary pollution.

5. Biodegradation rate: Meet high-end environmental standards for ecological compatibility.

6. Heavy metals: Below safety limits for water contact chemicals.

7. pH & density: Highly consistent across batches to facilitate dosing and formulation compounding.

8. Appearance & odor: Uniform color with no pungent odor.

9. Scale & corrosion inhibition performance: Efficient suppression of scaling and equipment corrosion.

10. Storage stability: No delamination and no indicator attenuation after long-term storage.

(II) General Industrial Circulating Water & Wastewater Buyers

Core priority: High scale/corrosion inhibition efficiency, temperature/alkali resistance, excellent compatibility and cost-effectiveness with qualified biodegradation; minor impurity indicators are moderately relaxed.

1. Solid content: Meet contractual specifications with allowable routine fluctuation ranges.

2. Molecular weight: Matched to circulating water working conditions for stable scale inhibition capacity.

3. Scale inhibition & corrosion inhibition rates: Core functional indicators to ensure stable system operation.

4. Temperature & alkali resistance: Maintain unattenuated performance under industrial water conditions.

5. Total phosphorus: Undetectable to satisfy wastewater discharge environmental requirements.

6. Compatibility: Stable mixing with biocides, flocculants and other water treatment chemicals.

7. Biodegradation rate: Conform to local wastewater discharge codes.

8. pH & density: Stable indicators compatible with automatic dosing systems.

(III) Oilfield Reinjection Water Buyers

Core priority: Adapted molecular weight, high salinity/hard water tolerance, strong dispersibility and favorable formation compatibility; focus on tolerance to complex high-salinity water and adaptability to downhole working conditions.

1. Solid content: Stable content for uniform on-site injection concentration.

2. Molecular weight: Adopt oilfield-specific range for outstanding corrosion inhibition and dispersing effects.

3. Salt & high salinity tolerance: No precipitation and stable performance in high-salinity formation water.

4. Scale inhibition, corrosion inhibition & dispersing capacity: Suppress scaling and corrosion of pipelines, formations and equipment.

5. Compatibility: No abnormal reactions when compounded with oilfield demulsifiers, biocides and flocculants.

6. Ecotoxicity: Low toxicity to formations and surrounding environments.

7. Viscosity & fluidity: Adapted for long-distance pipeline transportation.

(IV) Daily Chemical & Industrial Cleaning Buyers

Core priority: Low odor, low irritation, qualified heavy metal limits, powerful chelating/dispersing capacity and stable compatibility; balance human contact safety and cleaning performance.

1. Solid content: Stable indicators for precise control of formulation addition ratios.

2. Molecular weight: Low-molecular range selected for superior chelating and dispersing performance.

3. Heavy metals & harmful impurities: Comply with daily chemical chemical limits.

4. Odor & color: Faint odor and uniform color.

5. Skin irritation: Low irritation suitable for contact products.

6. Chelating & dispersing power: Boost cleaning detergency and anti-redeposition effects.

7. Compatibility: No delamination or performance failure when compounded with surfactants and auxiliaries.

(V) Agricultural Fertilizer Synergist Buyers

Core priority: Stable solid content, strong fertilizer compatibility, favorable soil compatibility and no harmful residues; focus on adaptability for agricultural use with relaxed impurity requirements.

1. Solid content: Meet contractual standards with minimal batch variation.

2. Chelating synergistic capacity: Improve crop nutrient uptake efficiency of fertilizers.

3. Compatibility: No flocculation or precipitation when mixed with solid/liquid fertilizers.

4. Soil compatibility: No soil degradation after application and safe for crops.

5. pH & stability: Stable physical properties during storage and field application.

(VI) Cross-Border Chemical Raw Material Distributors

Core priority: Strong storage weather resistance, leak-proof/moisture-proof packaging and complete qualification documents; focus on market circulation and document compliance for bulk procurement, repackaging and resale.

1. Storage weather resistance: No obvious changes in solid content, color and viscosity after ocean shipping and cross-temperature zone warehousing.

2. Packaging protection: Leak-proof liquid drums and moisture-proof, damage-resistant solid drums intact after multiple transshipments.

3. Basic indicator sampling inspection: Verify solid content, pH, appearance and odor to match corresponding grades.

4. Temperature zone adaptability: Liquids do not congeal at low temperatures; solids resist severe moisture absorption and caking.

5. Qualification documents: Complete multi-lingual SDS, COA, biodegradation/phosphorus-free test reports and certificates of origin to pass audits in multiple countries.

For more professional and in-depth analysis on PASP selection, please contact HiSiaddi customer service.