A172: Common Difficulties Encountered by Buyers During Procurement & HiSiaddi’s Solutions

As a new-type foreign trade service provider driven by both technology transformation and foreign trade business, HiSiaddi has built a "1+2+3+4=1" service system and can supply A172 sourced from multiple well-known original manufacturers. With proprietary R&D capabilities, HiSiaddi professionally sorts out common challenges faced by B-end buyers sourcing A172 within China and provides corresponding solutions. For more professional and in-depth analysis on A172 procurement, please contact HiSiaddi customer service.

I. High-End Cable & Composite Material Manufacturers from EU & US (New Energy Cables, Automotive Wiring Harnesses, Epoxy Glass Fiber Laminates, Top-Tier Halogen-Free Flame Retardant Plastic Factories)

(I) Core Pain Points

1. Insufficient active content and excessive free 2-methoxyethanol: 2-methoxyethanol is regulated under EU REACH; shipments with excessive residues face port detention. Low active ingredient content causes agglomeration of fumed silica/aluminum hydroxide powder, sharp drops in mechanical strength and wet electrical performance of cable compounds, and excessive leakage current.

2. Elevated water content triggers premature hydrolysis and self-polymerization, forming sediment at drum bottoms. Granular protrusions and surface blemishes on cable jackets during compounding lead to full batch scrapping.

3. Excess trace vinyl monomer causes bloom precipitation on long-term stored cables, resulting in mass rejection by automotive OEMs; high color index prevents use in light/transparent flame retardant cable formulations.

4. Heavy metal impurities exceed RoHS limits, leading to failed filing for electronic cable formulations.

(II) Targeted Solutions

1. Precision esterification synthesis + multi-stage vacuum distillation delivers high-purity grade with active content ≥98.5%. Free 2-methoxyethanol is controlled to within 45% of regulatory limits, meeting EU cable market access standards.

2. Molecular sieve deep dehydration reduces water content to ≤0.08%, eliminating pre-hydrolysis and sedimentation under sealed ambient storage for compatibility with automated continuous compounding lines.

3. Light fraction monomer removal eliminates bloom precipitation after 18 months of sealed storage; low-color refined grades support transparent halogen-free cable formulations.

4. Chelation-based impurity removal ensures heavy metal levels far below RoHS thresholds; full SGS test reports support product compliance filing.

II. EU & US Coating & Adhesive Manufacturers (Water-Based Acrylic Emulsions, Glass/Metal Inks, Label Adhesives, Silicone Seal Primers)

(I) Core Pain Points

1. Unstable hydrolysis rate causes coating stratification, film cratering and loss of gloss post-addition; poor glass ink adhesion leads to ink detachment.

2. Raw material turbidity and precipitation under low-temperature storage/transportation causes partial gelation and pipeline blockages during winter feeding, increasing production waste.

3. Excess by-products create strong odor after coating baking, failing EU indoor coating environmental certification requirements.

(II) Targeted Solutions

1. Precisely controlled alkoxy substitution delivers consistent batch-to-batch hydrolysis rate, compatibility with water-based emulsions with no cratering or stratification, and drastically improved film adhesion to glass and metal substrates.

2. Narrow-cut distillation formulation remains clear with no precipitation after 72 hours static storage at -10°C, compatible with low-temperature production conditions in Northern Europe.

3. Deep removal of small-molecule by-products delivers low-odor finished coatings compliant with EU indoor coating VOC and environmental certification standards.

III. Japanese & South Korean Fine Chemical & Cable Raw Material Enterprises (Japanese Home Appliance Wiring, Photovoltaic Backcoatings, Glass Fiber Sizing Raw Materials)

(I) Core Pain Points

1. 2-methoxyethanol and hazardous impurities hover near Japan’s Ministry of Health, Labour and Welfare chemical control thresholds; failed border spot checks prevent domestic production launch.

2. Lack of Japanese-language specification sheets and raw material filing documentation blocks entry into supply chains of top Japanese cable manufacturers, limiting product premium potential.

3. Unstable powder modification performance leads to fluctuating limiting oxygen index (LOI) of halogen-free flame retardant compounds, triggering returns and compensation claims from home appliance brands.

(II) Targeted Solutions

1. Secondary refining reduces restricted hazardous substances to below 40% of Japanese regulatory limits for smooth passage of Ministry of Health inspections.

2. Supply Japanese-language MSDS and COA, assist customers with Japanese chemical raw material filing, and facilitate cooperation with formulators including Shin-Etsu and Sumitomo.

3. Stable active ingredient content delivers uniform dispersion of aluminum/magnesium hydroxide powder, with LOI fluctuation controlled ≤1.5% for consistent flame retardant cable performance.

IV. Small & Medium Rubber & Plastic / Coating Factories in India & Southeast Asia (Civil Wires, General Filler Modification, Economical Water-Based Coatings; Cost-Oriented Buyers)

(I) Core Pain Points

1. Low-quality supplies diluted with alcohol solvents and low-boiling silicone oils deliver insufficient A172 active content, resulting in failed filler modification, cable cracking and leakage risks.

2. Hot & humid tropical environments combined with poor standard plastic drum sealing allow moisture ingress, triggering hydrolytic thickening and drum bulging leading to full batch scrappage; incomplete compliance documentation causes customs detention and fines.

(II) Targeted Solutions

1. Industrial purity grade free of solvent dilution maintains stable active content, priced 23%–28% lower than high-purity electronic grades for compatibility with low-end civil cable formulations.

2. Thickened HDPE sealed drums with internal gaskets resist water ingress and drum bulging after 6 months exposure to 48°C high-humidity environments.

3. Full batch COA, MSDS and Halal certificates provided; support local chemical filing in destination countries to avoid detention risks.

V. Global Chemical Distributors (Small-Drum Silane Coupling Agent Repackaging, Compound Powder Modifier Blending, Compound Primer Stock Solutions)

(I) Core Pain Points

1. Widespread market adulteration via solvent dilution with falsely labeled active content, leading to costly compensation and lost clients for rubber & plastic manufacturers after failed modification.

2. Poor packaging sealing allows moisture ingress and hydrolytic thickening during long ocean shipping, resulting in full order rejection by high-end composite manufacturers; incomplete compliance documentation blocks cooperation with large EU/US buyers.

3. Open-air repackaging exposes product to air moisture, triggering premature hydrolysis and failure of small-packaged inventory.

(II) Targeted Solutions

1. Direct supply from original synthesis manufacturers with full batch testing reports covering active content, residual alcohol and water content; third-party SGS re-inspection supported to eliminate adulterated diluted goods.

2. 200L PE-lined steel drums with pressure-resistant leak-proof sealing for temperature fluctuations during transoceanic shipping.

3. Nitrogen-purged dust-free sealed repackaging maintains stable physicochemical indicators for 12 months under cool 25°C storage; one-stop supply of full REACH, TSCA and RoHS compliance documentation for direct access to global top-tier supply chains.

For more professional and in-depth analysis on A172 procurement, please contact HiSiaddi customer service.

Lead time

The monthly inventory volume of A 172 is 15 tons, with appropriate adjustments upwards or downwards in response to peak and off-peak seasons.

HiSiaddi safeguards the supply stability of A 172 through the following measures:

1. Supply of one mainstream A 172 model by 3 premium factories

(1) Performance evaluation and screening of A 172 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 A 172, 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 A 172

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 A 172 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 15 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 A 172 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 A 172 sea and land shipments

Unstable logistics for A 172 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 A 172

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 A 172

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 A 172

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.

A172: What Qualifications & Certifications Have Leading Chinese Brands Obtained? What Is Their Market Feedback?

As a new-type foreign trade service provider driven by both technology commercialization and export business, HiSiaddi has built a "1+2+3+4=1" service system and can supply A172 sourced from multiple well-known original manufacturers.

As an R&D-focused export service provider, HiSiaddi avoids the bias of single-brand factories and objectively analyzes multiple competitive Chinese export brands of A172, sharing their certification credentials and market feedback to help buyers make efficient, reliable sourcing decisions.

For authentic, objective detailed profiles of multiple Chinese A172 brands, contact HiSiaddi customer service.

1. Jianghan New Materials (JHSI) – Certified Global Tire Supplier & Benchmark for High-End A172

Main Grades (Ultra-High Purity & Electronic Grades, Direct Equivalent to Momentive A172)

· JHSI A172 (General Ultra-High Purity): Purity ≥99.8%, hydrolysis stability 35±2 min, flagship grade for industrial rubber and composite materials.

· JHSI A172E (Electronic/PV Grade): Purity ≥99.9%, metal ions (Na/Fe/Cl) <5 ppm, specially formulated for PV backsheets and semiconductor packaging.

· JHSI A172R (Rubber-Specific Grade): Low VOC with enhanced silica dispersion, optimized for high-filler EPDM/tire formulations.

Global Market Feedback (Verified Customer Testimonials & Data-Driven Performance)

· European tire manufacturers (Michelin, Pirelli, Continental): "JHSI A172R delivers identical performance to Momentive Silquest A172, with 88–90% wet strength retention, superior mixing stability and batch fluctuation limited to ≤3%." Long-term designated supplier since 2022–2025; the only domestic silane approved for premium green tire formulations.

· North American PV & cable manufacturers: A172E used in PV backsheet coatings delivers zero chalking after 1500h UV exposure and 40% improved water vapor barrier performance; XLPE high-voltage cable dielectric strength increases 10x, formally incorporated into US EPR/EPDM cable standards.

· Asia-Pacific wind composite manufacturers: Delivers glass fiber wetting for wind turbine blades with interlaminar shear strength (ILSS) ≥85 MPa and 89% wet strength retention; extends service life by 25% vs. standard domestic A172 with a 92% repeat order rate.

Authoritative Recognitions (Verified, High-Value Credentials)

· Global OEM certifications: Michelin Annual Best Supplier (2019/2021), Pirelli Global Excellent Supplier (2024), Continental Tier-A Qualified Supplier.

· International compliance: Full REACH SVHC clearance, TSCA, CE, RoHS, UL cable certification.

· Management & laboratory accreditations: ISO 9001, ISO 14001, IATF 16949, CNAS laboratory accreditation, TÜV SÜD certification, MIIT Single Champion Demonstration Enterprise.

· Industry standing: 14% global market share, China’s top A172 exporter, top 3 global functional silane manufacturer.

2. Jiangxi Hongbai New Materials (HONBOR) – Full Industrial Chain & Low-VOC Leader, Mainstream Raw Material for Tires & Coatings

Main Grades (Industrial, Ultra-High Purity & Low-VOC, Cost-Performance Benchmark)

· HONBOR A172 (General Industrial): Purity ≥99.5%, consistent bulk supply with clear price advantages, primary grade for Southeast Asian/South American mass production.

· HONBOR A172HV (High Purity): Purity ≥99.8%, hydrolysis stability 33±2 min, universal for tires and wind power components.

· HONBOR A172F (Low-VOC Eco Grade): 2-methoxyethanol <500 ppm, meets 2025 REACH restrictions, developed for coatings and construction sealants.

Global Market Feedback (Large-Scale Client Performance Data)

· Global tire supply chains (Bridgestone, Sumitomo, Continental): "A172HV drastically improves silica dispersion, shortens mixing cycles by 15–20%, cuts tire wear by 12% and reduces rolling resistance by 8%, meeting EU Tire Label Class A standards." Global certified supplier for 2023–2025, primary silane for Asian manufacturing plants.

· EU coating & construction sealant manufacturers: A172F passes EN 15651 construction sealant certification with VOC <10 g/L; boosts neutral silicone sealant substrate adhesion by 40% with zero cracking after 1000h weathering testing.

· Southeast Asian (Vietnam/Thailand/Indonesia) rubber manufacturers: "25–30% lower pricing than imports with stable consistent quality and 3–5 day lead times, supporting small-batch customization." Repeat order rate >80%, preferred domestic A172 for local tire, footwear and sealant production.

Authoritative Recognitions (Full Industrial Chain & Green Certifications)

· Global tire OEM approvals: Bridgestone, Sumitomo Rubber global certified suppliers with audit scores of 94–96 (Tier A).

· Environmental compliance: REACH, RoHS, CE, 2025 CBAM low-carbon compliance, Ministry of Ecology and Environment Green Factory certification.

· Management accreditations: ISO 9001, ISO 14001, OHSAS 18001, IATF 16949, MIIT Single Champion Demonstration Enterprise.

· Industry standing: World’s top producer of sulfur-containing silanes, China’s second-largest A172 exporter, benchmark for green circular silane full industrial chains.

3. Jiangxi Chenguang New Materials (CHENGUANG) – Ultra-High Purity Electronic Grade & EU Premium Market Passport

Main Grades (Ultra-High Purity, Electronic & Water-Resistant, Direct Equivalent to Shin-Etsu KBC1003)

· CG A172 (General Ultra-High Purity): Purity ≥99.8%, hydrolysis half-life 35±2 min, flagship grade for wind power and automotive lightweighting.

· CG A172E (Electronic/PV Grade): Purity ≥99.9%, metal ions ≤3 ppm, exclusively for copper clad laminates and semiconductor encapsulation.

· CG A172W (Water-Resistant Grade): Hydrolysis stability 38±2 min, retains >90% mechanical performance under 85°C/85% RH high-humidity conditions.

Global Market Feedback (EU Premium & Japanese/Korean Electronics Sectors)

· European offshore wind power (Germany/Denmark): "CG A172W treats glass fiber epoxy systems delivering ILSS ≥85 MPa and 82% strength retention after 1500h UV aging, meeting Fraunhofer Institute recommended standards for wind materials." Specified silane for European offshore wind turbine blades 2024–2025.

· North American automotive lightweighting (BMW/Mercedes supply chains): Used for glass fiber-reinforced PP/PA components, lifting interfacial strength by 50% and enabling 18% component weight reduction, fully compliant with IATF 16949 automotive material standards.

· Japanese/Korean electronic packaging (Shin-Etsu/Hitachi replacement): A172E applied to CCL and semiconductor epoxy molding compounds with batch RSD <0.5% and metal ions ≤3 ppm, fully substituting Shin-Etsu KBC1003 at a 25% cost reduction.

Authoritative Recognitions (High-End Material & International Certifications)

· R&D institution approvals: Fraunhofer Institute wind power material certification, UL electronic-grade silane certification.

· Compliance credentials: REACH, TSCA, CE, RoHS, full REACH SVHC exemption.

· Management accreditations: ISO 9001, ISO 14001, IATF 16949, CNAS, National Specialized, Refined, Unique & Innovative "Little Giant" Enterprise, national industry standard drafting unit.

· Industry standing: China’s top producer of electronic-grade A172, preferred domestic supplier for EU premium markets.

4. Nanjing Shuguang Chemical (SHUGUANG) – Long-Established European Market Reputation & Superior High-Temperature Stability

Main Grades (Standard, High-Temperature & Low-Odor, European Localized Supply)

· SH A172 (Standard Grade): Purity ≥99.5%, reliable consistent performance, traditional mainstream grade for European rubber and cable applications.

· SH A172H (High-Boiling Stable Grade): Boiling point 285°C, no thermal decomposition at 200°C, formulated for EPDM high-temperature extrusion cables.

· SH A172L (Low-Odor Low-VOC Grade): Odor level ≤Grade 2, VOC <15 g/L, for construction sealants and interior coatings.

Global Market Feedback (20 Years European Market Presence + Middle East/Africa Reach)

· European rubber & cable manufacturers (Germany/France/Italy): "Shuguang A172 has been used in Europe for over 20 years with consistent batch-to-batch quality; SH A172H prevents interfacial delamination during 200°C high-temperature extrusion, extending cable service life by 30%." Long-term recognized by TÜV Rheinland, with 3-day local delivery from European warehouses.

· Middle Eastern/African construction sealant manufacturers: SH A172L passes EN 15651 certification with low odor and superior weather resistance; sealants remain crack-free after 5 years under desert 50°C high-temperature conditions, holding >35% local market share.

· General cost-performance market buyers: "20% lower pricing than imported grades with near-international quality, fast delivery and responsive technical support for long-term stable partnerships."

Authoritative Recognitions (Long-Standing Qualifications & European Certifications)

· European accreditations: EN 15651 construction sealant certification, TÜV Rheinland, EAC Eurasian Union certification.

· Compliance credentials: REACH, RoHS, CE, formally referenced in US EPR/EPDM cable standards.

· Management accreditations: ISO 9001, ISO 14001, OHSAS 18001 (industry’s earliest adopter), National Science and Technology Progress Second-Class Award.

· Industry standing: China’s first silane coupling agent manufacturer, lead drafter of all national and industrial silane standards, top domestic brand by European market reputation.

5. Zhejiang Huangma Technology (HUANGMA) – Industrial Grade Cost-Performance Leader, First Choice for Southeast Asian & South American Markets

Main Grades (General Industrial & Filler-Modified, Optimal Low-Cost Option)

· HM A172 (General Industrial): Purity ≥99.0%, ultra-cost-effective, mass-production staple for Southeast Asian/South American tires, footwear and seals.

· HM A172M (Filler-Modified Special Grade): Optimized for aluminum hydroxide/magnesium hydroxide and talc mineral fillers, delivering 30% improved dispersion for flame-retardant materials.

Global Market Feedback (Large-Scale Low-Cost Segments & Stable Repeat Orders)

· Southeast Asian/South American rubber manufacturers (Brazil/Mexico/Indonesia): "Huangma A172 costs 35–40% less than imports while meeting industrial-grade requirements; improves silica dispersion and cuts reject rates by 8–10%, delivering unmatched cost performance." Repeat order rate >75%, dominant domestic brand for local mid-to-low-end markets.

· Flame-retardant materials (wire & cable, engineering plastics): HM A172M modifies aluminum/magnesium hydroxide fillers to raise maximum loading by 20%, reduce system viscosity by 15% and cut formulation costs by 12%; complies with UL 94 V0 flame retardant standards.

· Mid-to-low-end coatings & adhesives: Applied to architectural coatings and wood adhesives, lifting substrate adhesion by 25% and extending shelf stability by 50%; ideal for large-scale cost-sensitive production.

Authoritative Recognitions (Basic Compliance & Industry Endorsements)

· Compliance credentials: Basic REACH registration, RoHS, CE, UL flame retardant certification.

· Management accreditations: ISO 9001, ISO 14001, National Enterprise Technology Center, MIIT Single Champion Enterprise, National Specialized, Refined, Unique & Innovative "Little Giant" Enterprise.

· Industry recognition: Recommended product by China Petroleum and Chemical Industry Federation, drafter of over 80 national/industrial standards.

· Industry standing: Domestic leader in specialty surfactants, China’s fifth-largest exporter of industrial-grade A172, benchmark for cost-sensitive mass-market applications.

For authentic, objective detailed profiles of multiple Chinese A172 brands, contact HiSiaddi customer service.

A172: Production Processes, Supply Stability and Core Performance Indicators of China’s Top 5 Leading Brands

As a new-type foreign trade service provider driven by both technology commercialization and export business, HiSiaddi has built a "1+2+3+4=1" service system and can supply A172 sourced from multiple well-known original manufacturers.

As an R&D-focused export service provider, HiSiaddi avoids the bias of single-brand factories and objectively analyzes multiple competitive Chinese export brands of A172, sharing their production processes, supply stability and core performance indicators, as well as their downstream procurement impacts, to help buyers make efficient, reliable sourcing decisions.

For authentic, objective detailed profiles of multiple Chinese A172 brands, contact HiSiaddi customer service.

1. Jianghan New Materials (JHSI, China’s #1 A172 Export Volume, Direct Equivalent to Momentive Silquest A172 OEM Standards)

1.1 Closed-Loop Continuous Synthesis + 3-Stage Ultra-High Vacuum Precision Distillation, Impurity Control from Raw Material Source

1. Complete synthetic workflow: Industrial silicon metal → self-supported trichlorosilane plant synthesizes high-purity TCS → thermal cracking addition produces vinyltrichlorosilane intermediates → closed low-temperature alcoholysis reaction → directional transesterification yields crude A172 → 3-stage gradient ultra-high vacuum precision distillation → finished product nitrogen-blanketed tank storage.

2. Exclusive core process designs ① Closed-loop chlorine recycling: Hydrogen chloride byproducts from transesterification and alcoholysis are fully dry-recovered and recycled to upstream trichlorosilane synthesis, eliminating waste acid discharge with 96.7% raw material utilization rate, cutting feedstock loss by 21% vs. batch reactor processes. ② Custom selective catalytic system: Self-formulated organotin composite catalysts drastically reduce 2-methoxyethanol byproduct generation; general-grade byproduct alcohol ≤300 ppm, superior to national standard limits for generic grades. ③ 3-stage high-vacuum distillation: Vacuum gradually reduced to 0.5–1 kPa with distillation tower temperature controlled at ±0.3°C, separating light/heavy impurity fractions in stages; electronic-grade production eliminates metal ion leaching at the distillation stage. The full production line features fully automated DCS closed-loop control for real-time regulation of reaction temperature, dosing rate and vacuum levels.

3. Segregated production lines: 1 continuous general-grade production line, 1 dedicated clean electronic-grade line with full PTFE-lined 316L mirror stainless steel equipment to prevent metal contamination from vessel surfaces.

1.2 Self-Supported Intermediate Capacity + Tiered Permanent Safety Stock + Global Multi-Warehouse Layout, 100% Annual On-Time Delivery Rate

1. Capacity base: Annual A172 finished product design capacity 18,000 tons, paired with in-house 60,000 t/y trichlorosilane capacity; 100% self-sufficient core intermediates, insulated against external feedstock supplier disruptions and price hikes.

2. Tiered inventory reserves: Permanent year-round safety stock of 3,000 tons, including 1,700 tons JHSI-A172 general ultra-high purity, 800 tons JHSI-A172E electronic/PV grade, 500 tons JHSI-A172R rubber-specific grade. An additional 1,000 tons temporary locked inventory during peak demand seasons (March–May, September–November, new energy procurement cycles).

3. Global logistics support: Permanent spot inventory in Shanghai and Ningbo bonded warehouses domestically; 450 tons permanent spot stock at Rotterdam overseas warehouse (Europe); 260 tons bonded spot stock at Haiphong, Vietnam warehouse (Southeast Asia).

4. Delivery timelines & risk resilience: 7–9 day port arrival for European/American FOB Shanghai shipments; 3-working-day local pickup from Rotterdam warehouse; 3–5 day direct delivery to end-users from Haiphong warehouse. Zero delayed delivery records for annual framework contracts with Michelin and Pirelli over the past three years, with full order fulfillment sustained during sharp upstream chlorosilane price surges.

1.3 Internal Control Key Performance Indicators for Three Core Grades (Lab Tested Against Original Momentive A172)

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1.4 Ultra-Low Impurity Indicators Optimize Downstream Formulations, Reduce Production Losses & Deliver 25–30% Import Raw Material Cost Substitution Savings

1. Tire/EPDM rubber downstream clients (Michelin/Pirelli supply chains): A172R delivers 40% improved silica wetting and dispersion, shortening internal mixing cycles by 15% and cutting filler agglomeration reject rates by 9%. Vulcanized rubber retains 88–90% wet strength after 1000h 85°C humid heat exposure, meeting EU Tire Label Class A rolling resistance standards. Customers achieve direct 1:1 replacement of original Momentive A172 with ~27% raw material procurement cost reduction.

2. PV backsheet & high-voltage XLPE cable manufacturers: Ultra-low metal ion content of A172E prevents local breakdown of cable insulation layers, boosting finished cable dielectric strength 10x. PV backsheet coatings resist 1500h UV exposure without chalking/cracking and deliver 40% enhanced water vapor barrier performance, lifting finished PV module yield rates by 3.2%.

3. Glass fiber reinforced wind composite manufacturers: General ultra-high purity grade applied to epoxy-glass fiber substrates delivers stable ILSS ≥85 MPa with 89% long-term aging strength retention under high humidity; wind turbine blade service life extended by 25% vs. standard domestic A172 alternatives.

2. Jiangxi Hongbai New Materials (HONBOR, China’s #2 A172 Exporter, Mass-Production Mainstream for Tires & Eco-Friendly Sealants)

2.1 Full Industrial Chain Integrated Continuous Production + Finished Product Deep Dealcoholization Process, Optimized for EU REACH Low-VOC New Regulations

1. Synthetic workflow: In-house silicon metal smelting → trichlorosilane synthesis plant → vinyltrichlorosilane synthesis → continuous tubular alcoholysis & integrated transesterification reaction → atmospheric primary distillation + negative-pressure deep dealcoholization → fractional distillation to produce industrial, ultra-high purity and low-VOC three finished grades. Full production line adopts continuous tubular reactors, eliminating traditional batch reactors.

2. Differentiated process highlights ① Fully self-sufficient intermediate chain: 50,000 t/y trichlorosilane capacity covering silicon ore to finished product with full automated process control, delivering strong cost predictability. ② A172-F low-VOC dedicated dealcoholization unit: Post-distillation crude product passes through negative-pressure thin-film dealcoholization to selectively remove free 2-methoxyethanol, complying with 2025 EU SVHC control limits. ③ Closed-loop RTO waste gas incineration: All production waste gas is collected and incinerated, with recovered waste heat supplying distillation heating. This process is listed in national green factory process specifications, supporting CBAM carbon footprint accounting.

3. Production line configuration: 1 10,000 t/y general continuous production line, 1 5,000 t/y eco-modified dedicated line with segregated manufacturing to avoid cross-contamination between grades.

2.2 20,000 t/y Finished Product Capacity + Multi-Region Bonded Warehouse Stock, Supporting Annual 10,000-Ton Framework Procurement for Overseas Key Clients

1. Capacity data: Total A172 capacity 20,000 t/y, 55% industrial grade, 25% HV ultra-high purity grade, 20% F eco low-VOC grade.

2. Permanent inventory: Static year-round safety stock 2,500 tons, including 1,300 tons general industrial A172, 700 tons HV ultra-high purity, 500 tons F eco grade. Combined 620 tons permanent spot inventory in Vietnam and Thailand Southeast Asian bonded warehouses.

3. Delivery guarantee: 10–12 day port arrival for European FOB Ningbo shipments, 3–5 day door-to-door delivery from Southeast Asian bonded warehouses. Flexible batch scheduling from 5–500 tons per order, with 99.8% on-time delivery for annual framework contracts with Bridgestone and Sumitomo. Self-supported intermediate feedstock mitigates cost volatility during severe raw material price spikes, delivering far narrower quotation swings vs. manufacturers relying on outsourced intermediates.

2.3 Internal Control Key Performance Indicators for HONBOR Three Core Grades

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2.4 Scaled Cost-Performance & Dual Eco-Advantages Support Overseas Tire & Sealant Manufacturers to Cut Costs While Meeting Compliance

1. Global tire manufacturers (Bridgestone/Sumitomo Asian facilities): HV ultra-high purity grade optimizes silica dispersion in rubber systems, shortening mixing cycles by 18%, cutting tire wear by 12% and rolling resistance by 8%, easily meeting EU Tire Label regulations, with 28% lower raw material procurement costs vs. imported European/American alternatives.

2. EU construction sealant & industrial coating manufacturers: F low-VOC grade delivers VOC <10 g/L and full compliance with mandatory EU EN15651 construction sealant certification; boosts neutral silicone sealant substrate adhesion by 40% with zero cracking after 1000h xenon arc weathering testing, eliminating costly formulation environmental retrofits for EU factories.

3. Southeast Asian small-to-medium rubber manufacturers (Vietnam/Indonesia): Standard industrial grade costs 25–30% less than imports with stable consistent quality and minimal batch variation, cutting rubber goods reject rates by 8–10% and holding >80% repeat order rates locally.

3. Jiangxi Chenguang New Materials (CHENGUANG, Leading Exporter of High-End Electronic/PV/Offshore Wind A172, Direct Equivalent to Shin-Etsu KBC-1003)

3.1 Ultra-High Purity Intermediates + Fully Sealed Clean Synthesis + Molecular Distillation Refining Process, Specialized for Ultra-Low Metal Ions & Hydrolysis-Resistant Modified Grades

1. Synthetic workflow: High-purity silicon metal → electronic-grade trichlorosilane (main content ≥99.99%, total impurities <10 ppm) → refined vinyltrichlorosilane → fully sealed 316L+PTFE-lined reactors for low-temperature alcoholysis & transesterification → high-vacuum molecular distillation to produce CG-A172 general/electronic/water-resistant three product lines.

2. Core process advantages ① Upstream purity control: Front-end trichlorosilane undergoes precision distillation purification to reduce metallic impurities at the raw material source, unlike standard manufacturers using industrial-grade intermediate feedstock. ② Molecular distillation refining: Distillation vacuum reduced to 1 Pa for low-temperature separation of heat-sensitive impurities, preventing A172 thermal decomposition and byproduct generation. ③ Exclusive CG-A172W water-resistant modification process: Tuned alkoxy side-chain ratios extend molecular hydrolysis cycles and enhance stability under 85°C/85% RH high-humidity conditions.

3.2 15,000 t/y Capacity + Dedicated Electronic Grade Locked Inventory, Priority Scheduling for European Wind & Japanese/Korean Electronic Orders to Guarantee On-Time Delivery

1. Capacity structure: Annual A172 capacity 15,000 tons, 60% allocated to electronic/PV grade (CG-A172E), 40% combined general and water-resistant grade capacity. Self-supported high-purity trichlorosilane plant eliminates outsourced high-end intermediate reliance.

2. Inventory allocation: Total permanent stock 2,000 tons, including 800 tons dedicated nitrogen-blanketed electronic grade storage tanks, 1,200 tons general + W water-resistant grade inventory. 380 tons permanent spot stock at Hamburg, Germany overseas warehouse.

3. Delivery timelines: 5-day direct sea freight to Japan/Korea; 3–4 day local pickup from Hamburg warehouse for European clients. Annual framework contracts for offshore wind projects secure dedicated production capacity, with priority scheduling during new energy material supply crunches and zero delayed high-end orders over the past two years.

3.3 Internal Control Key Performance Indicators for Three Chenguang Grades

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3.4 Ultra-Low Impurity & Hydrolysis-Resistant Performance Target High-End Segments, Enabling Overseas Wind & Electronics Manufacturers to Replace Costly Japanese Imports

1. European offshore wind glass fiber epoxy components: W water-resistant grade retains >90% mechanical strength after 1000h 85°C humid heat exposure with finished ILSS ≥85 MPa, certified to Fraunhofer Institute wind material standards. Offshore wind blade manufacturers extend product weathering service life by 20% with a 25% reduction in imported silane procurement costs.

2. Japanese/Korean CCL copper clad laminate & semiconductor epoxy molding factories: Ultra-low metal ion content of A172E eliminates circuit board leakage and molding compound black spot defects, with batch performance RSD <0.5% for direct 1:1 substitution of Shin-Etsu KBC-1003, drastically cutting import raw material expenditure.

3. European/American new energy vehicle glass fiber modified PP/PA components: General ultra-high purity grade strengthens resin-glass fiber interfacial bonding by 50% enabling 18% vehicle component weight reduction, helping auto parts manufacturers meet lightweight regulatory standards and boost finished product premium pricing.

4. Nanjing Shuguang Chemical (SHUGUANG, China’s Longest-Established Silane Manufacturer, Mainstream European Supplier for Cables & Construction Sealants)

4.1 50+ Years Mature Traditional Synthesis + High-Boiling Fraction Targeted Optimization + Low-Odor Deep Refining Process, Specialized for High-Temperature Stability & Low-Odor Grades

1. Synthetic workflow: Industrial silicon metal → trichlorosilane synthesis → vinyltrichlorosilane → medium-temperature alcoholysis + transesterification reaction → atmospheric distillation + negative-pressure light fraction removal dual-stage process to produce SH standard/H high-temperature/L low-odor three A172 finished grades. China’s first enterprise to achieve industrial A172 mass production, with five iterative process optimization cycles over decades.

2. Differentiated process advantages ① Custom SH-A172H high-temperature modified process: Precise enrichment of high-boiling active components during distillation, removing low-boiling volatile impurities to lock consistent 285°C atmospheric boiling point for finished product. ② SH-A172L low-odor deep refining: Adsorption deodorization unit added post-distillation to strip trace low-carbon alcohol impurities, delivering finished odor level ≤Grade 2 ideal for interior sealant and eco-coating formulations. ③ Semi-automated full production line with mature, low-variability processes; batch repeatability validated by decades of European market field application.

4.2 10,000 t/y Capacity + Permanent Rotterdam Spot Warehouse, Deep European Market Localization Delivering Ultra-Fast Domestic Delivery

1. Capacity: Annual A172 capacity 10,000 tons, 6,000 tons standard general grade, 2,500 tons H high-temperature grade, 1,500 tons L low-odor grade.

2. Inventory: Total permanent domestic safety stock 1,500 tons, fixed 500 tons permanent spot inventory at Rotterdam European core warehouse, 220 tons bonded spot stock at Dubai warehouse for Middle East markets.

3. Delivery timelines: European clients prioritize Rotterdam warehouse spot stock with full pickup & distribution completed within 3 working days; Dubai warehouse shipments cover Middle East/North Africa within 7–10 days. 99.5% on-time delivery for long-term European established clients, with consistent spot supply during seasonal European raw material shortages.

4.3 Internal Control Key Performance Indicators for Three Shuguang Grades

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4.4 Dual High-Temperature & Low-Odor Specialties Meet European Regulatory Standards, Helping Overseas Cable & Sealant Manufacturers Avoid Environmental Compliance & Product Failure Risks

1. European EPDM high-temperature extrusion cable manufacturers: H high-temperature grade maintains structural stability without decomposition or precipitation during continuous 200°C extrusion, forming strong permanent bonding between cable insulation and core conductors to extend finished cable service life by 30% and fully comply with US EPR cable material standards.

2. European/Middle Eastern construction sealant manufacturers: L low-odor grade passes EU EN 15651 certification with low odor suitable for interior construction sealants; sealants remain crack-free and non-delaminating after 5 years under extreme 50°C desert conditions, steadily lifting local market share for regional sealant manufacturers.

3. Small-to-medium European rubber component manufacturers: Consistent quality standard grade paired with fast local replenishment from European warehouses eliminates large-volume raw material stockpiling and cuts warehouse capital occupation, delivering 20% lower procurement costs vs. fully imported original silane grades.

5. Zhejiang Huangma Technology (HUANGMA, Cost-Leading Industrial-Grade A172 Exporter, Preferred for Cost-Sensitive Southeast Asian/South American Rubber & Flame-Retardant Filler Modification)

5.1 Economical Simplified Continuous Synthesis + Filler-Modified Targeted Optimized Distillation Process, Strict Cost Control for Mass Generic Industrial Applications

1. Synthetic workflow: Industrial silicon metal → outsourced industrial-grade trichlorosilane → vinyltrichlorosilane → standard alcoholysis & transesterification → single-stage negative-pressure simplified distillation to produce HM general industrial and HM-M filler-modified two A172 finished grades. Ultra-high-purity multi-stage precision distillation removed to compress capital equipment and energy expenditure, focused exclusively on cost optimization.

2. Process characteristics ① Simplified distillation workflow: Elimination of multi-stage ultra-high vacuum impurity fraction cutting reduces equipment investment and energy consumption, delivering finished product costs 35–40% lower vs. high-end premium brands. ② HM-M filler-modified optimized process: Catalyst ratios fine-tuned during synthesis to strengthen wetting performance on aluminum hydroxide/magnesium hydroxide inorganic mineral fillers, purpose-built for flame-retardant filler modification formulations. ③ Large-batch mass production: 15-ton single reactor batch sizes dilute unit production costs via scale economies.

5.2 8,000 t/y Industrial-Grade Capacity + Consolidated LCL Consolidation Shipping, Optimized for Small-Batch Cost-Sensitive Buyers in South America & Southeast Asia

1. Capacity: Total annual A172 capacity 8,000 tons, fully industrial-grade positioning; 70% HM-A172 general grade, 30% HM-M filler-modified dedicated grade.

2. Inventory: Permanent year-round safety stock 1,000 tons, 180 tons bonded spot inventory at Ho Chi Minh, Vietnam warehouse.

3. Delivery timelines: 3–5 day port arrival for Southeast Asian LCL consolidated shipments; 12–15 day sea freight to Brazil/Mexico South American LCL ports. Minimum order quantity 1 ton supporting small-batch consolidated shipments for small-to-medium factory scattered procurement. Stable product pricing with narrow volatility bands; large-scale production capacity stabilizes quotations during upstream raw material price surges with >75% repeat order rates across Southeast Asian clients.

5.3 Internal Control Key Performance Indicators for Two Huangma Grades

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5.4 Extreme Cost-Performance Cuts Downstream Raw Material Expenses, Ideal for Mass-Production Low-Cost Rubber & Filler Modification in Southeast/South America

1. Southeast Asian/South American tire, rubber footwear and sealant manufacturers: General grade delivers 30% improved silica dispersion, cutting rubber goods reject rates by 8–10% with raw material costs 35–40% lower than European/American imported silanes, enabling manufacturers to capture mid-to-low-end local market share via low-priced finished goods.

2. Inorganic flame-retardant modified plastics & cable filler manufacturers: HM-M filler-modified grade optimizes aluminum/magnesium hydroxide mineral filler compatibility, lifting maximum inorganic loading capacity by 20% and reducing system processing viscosity by 15%. High-cost resin substitution via mineral fillers cuts overall formulation costs by 12% with finished products easily passing UL94 V-0 flame retardant certification.

3. Mid-to-low-end industrial coating & general adhesive manufacturers: Improves inorganic powder-resin substrate adhesion by 25% and doubles adhesive shelf stability, perfectly matching cost-oriented mass-production formulations.

6. Comprehensive Brand Selection Summary (Sourcing Guidance for Overseas Buyers from Export Service Provider)

1. Process Tier Classification:

o Jianghan / Chenguang: Ultra-high purity precision synthesis processes (high-end electronics, new energy sectors)

o Hongbai: Full industrial chain green large-scale production (mass tire manufacturing, eco-friendly sealants)

o Shuguang: Mature high-temperature tailored processes (European cables, Middle Eastern sealants)

o Huangma: Economical mass-production processes (cost-sensitive rubber goods, filler modification)

2. Supply Stability Ranking: Jianghan > Chenguang > Hongbai > Shuguang > Huangma (Fully self-contained vertical chains > dedicated locked ultra-high purity inventory > large-scale integrated production > established European overseas spot warehouses > standard economical stock reserves)

3. Sourcing Selection Guidance

o Premium tires, PV backsheets, high-voltage cables → Jianghan

o Global large tire manufacturers, mass EU eco-sealant procurement → Hongbai

o Offshore wind power, electronic packaging, premium automotive modified plastics → Chenguang

o European local EPDM cables, low-odor interior construction sealants → Shuguang

o Southeast Asian/South American low-cost rubber goods, flame-retardant filler modification, cost-prioritized projects → Huangma

For authentic, objective detailed profiles of multiple Chinese A172 brands, contact HiSiaddi customer service.

A172: Key Factors for Buyers to Consider When Purchasing Based on HiSiaddi’s Market Experience

As a new-type foreign trade service provider driven by both technology transformation and foreign trade business, HiSiaddi has built a "1+2+3+4=1" service system and can supply A172 sourced from multiple well-known original manufacturers. With proprietary R&D capabilities, HiSiaddi provides professional analysis of key purchasing criteria and critical indicators to ease buyers’ selection concerns. For more professional and in-depth analysis on A172 procurement, please contact HiSiaddi customer service.

A172 Raw Liquid Sample 200kg Steel Drum Packaging

IBC Tote Packaging

I. Core Global Procurement Considerations (Pre-Transaction Risk Control)

(I) Compliance Verification for Target Market Access

Classification: Organosilane coupling additive, filler modifier, polymer crosslinking monomer Key controlled parameters: Active ingredient content, free alcohol, hydrolyzable chlorine, water content, heavy metals, VOC

· EU: REACH registration filing; cables comply with RoHS heavy metal restrictions; coatings subject to VOC emission limits

· North America: Listed under TSCA; wire & cable materials meet UL environmental standards; emulsion coatings regulated by EPA

· Japan & South Korea: Raw material filing under Chemical Substance Control Act; residual impurities controlled for halogen-free flame retardant systems

· Southeast Asia / Middle East / South America: General national standards for chemical raw materials. For transshipment to Europe & America, full COA + SGS testing and raw material traceability are required per batch. Customs will inspect MSDS and quality certificates; shipments with excessive impurities risk detention and rejection.

(II) Process Matching for Downstream Production

Physical & chemical properties: Colorless to pale yellow transparent liquid, miscible with aromatic and ester alcohol solvents, slightly soluble in water at room temperature (≤5%). Hydrolyzes slowly under moisture, compatible with peroxide crosslinking systems (PE, EPDM, unsaturated polyester).

1. Active ingredient content: Directly determines coupling efficiency and maximum filler loading; insufficient content causes powder agglomeration and reduced mechanical strength of finished products

2. Free 2-methoxyethanol: Volatile impurity; excessive levels lead to coating odor, extrusion foaming in cables and VOC non-compliance

3. Hydrolyzable / total chlorine: Chloride ions corrode copper & aluminum conductors; strictly controlled for wire & cable grades and a critical indicator for electronic materials

4. Water content: Excess water triggers premature hydrolysis and self-polymerization, causing stratification, performance degradation and shelf-life failure

5. Compatibility: Compatible with aluminum hydroxide/magnesium hydroxide halogen-free flame retardant powder, glass fiber, kaolin and fumed silica; copolymerizable with acrylic and VAE monomers in emulsion polymerization. Standard dosage: 0.5%~2.5%. Small-scale dispersion and mechanical testing is recommended for new formulations.

(III) Grade Classification & Selection Standards

1. High-Purity Cable Grade (EU/US halogen-free flame retardant cables, photovoltaic wires): Active content ≥98.5%, free alcohol ≤0.3%, hydrolyzable chlorine ≤10ppm, water ≤0.1%, Pb/Cd/Hg meet RoHS limits; standard grade for high-end low-smoke zero-halogen (HFFR) cables

2. Glass Fiber / Coating Grade (glass fiber reinforced plastics, water-based emulsion coatings): Active content ≥98.0%, free alcohol ≤0.6%, hydrolyzable chlorine ≤50ppm

3. General Industrial Grade (low-end rubber filling, ordinary filler modification): Active content ≥96.0%, relaxed limits for free alcohol and chlorine; optimized for procurement cost control

(IV) Supplier Production Capacity & Supply Stability Assessment

Core production process: Alcoholysis of vinyltrichlorosilane with methoxyethanol → neutralization & desalination → vacuum distillation to remove free alcohol and low-boiling impurities → precision filtration Key process controls: Low-temperature alcoholysis to reduce by-products, vacuum distillation for free alcohol removal, deep dechlorination, sealed moisture control. Prioritize integrated manufacturers with in-house monomer synthesis and distillation lines certified under ISO9001. Large-scale factories deliver consistent batch indicators and can issue cross-border test reports from SGS, Eurofins. Packaging options: 25kg PE plastic drums, 200kg internally coated steel drums, 1000L IBC totes. Standard lead time: 6–10 days. Small manufacturers without distillation processes often exceed free alcohol and chlorine limits, making their products ineligible for EU/US cable export markets.

(V) Cross-Border Packaging, Storage & Transportation Solutions

Physicochemical hazard classification: Non-dangerous goods, flash point 64°C, hydrolyzes slowly upon contact with water; stable under sealed ambient storage.

· Packaging: High-purity grades use hermetically lined PE packaging; industrial grades use standard plastic/steel drums

· Warehouse storage: Cool warehouse at 5–38°C, relative humidity <70%, protected from rain and direct sunlight

· Incompatible materials: Do not store alongside strong acids, strong alkalis or water-containing raw materials. Keep fully sealed and moisture-proof throughout logistics. Shelf life: 12 months; implement first-in-first-out stock rotation.

(VI) Customized Supporting Services

Custom ultra-low free alcohol refining, low-chlorine formulation customization, compound coupling systems, customized foreign-language MSDS & labels; supporting halogen-free cable filler modification formulas, regional regulatory interpretation, customs clearance document sorting.

II. Universal Basic Acceptance Indicators for All Grades

1. A172 Active Content (GC Gas Chromatography): High-purity cable ≥98.5%; coating/glass fiber ≥98.0%; industrial ≥96.0%

2. Free 2-Methoxyethanol: Cable grade ≤0.30%; coating grade ≤0.60%; industrial grade ≤1.50%

3. Hydrolyzable Chlorine: Cable/electronic grade ≤10ppm; coating grade ≤50ppm; industrial grade ≤200ppm

4. Water Content: All grades ≤0.15%

5. Refractive Index n₂₅ᴰ: 1.425~1.430; Density (20°C): 1.032~1.038g/cm³

6. Appearance: Clear and transparent with no suspended solids or turbidity; cloudiness indicates hydrolytic degradation

7. Heavy Metals: Pb, Cd, Hg comply with RoHS limits for EU/US cable export products

III. Specialized Control Indicators by Application Scenario

(I) EU & US UL Certified Halogen-Free Flame Retardant Wires & Cables

Strictly control active content, free alcohol, hydrolyzable chlorine and heavy metals to enable high loading of aluminum/magnesium hydroxide powder while meeting tensile strength and insulation performance requirements for finished cables.

(II) Water-Based Emulsion Coatings & Acrylic Adhesives

Low free alcohol to control VOC levels; improve coating adhesion to glass and metal plus boiling water resistance.

(III) Glass Fiber Reinforced Unsaturated Polyester & EPDM Rubber

Prioritize coupling activity to improve dispersion of glass fiber/inorganic fillers within resin and reduce melt viscosity.

(IV) Low-End Filled Rubber & Plastic Modification

Only control active content and water content; prioritize raw material procurement cost reduction.

IV. Cross-Border Compliance Documentation & Risk Control

(I) Mandatory Export Documentation

Basic documents: Production qualification certificates, MSDS, batch-specific COA, full SGS testing (active content, free alcohol, chlorine, water content, heavy metals)

· EU: REACH registration documents, RoHS test reports

· North America: TSCA filing, UL supporting documentation

· Japan & South Korea: Chemical substance filing materials

(II) Inherent Product Risk Warnings

1. Water ingress triggers rapid hydrolytic polymerization and product failure; sealed shipping containers are critical for ocean transport

2. Free alcohol and hydrolyzable chlorine are core quality control points for high-end EU/US cable orders; full batch testing is required for premium contracts

3. High-temperature storage accelerates volatile loss and minor hydrolysis; strict warehouse temperature control is mandatory

For more professional and in-depth analysis on A172 procurement, please contact HiSiaddi customer service.