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 sulfolane sourced directly from multiple well-known original manufacturers. As a tech-driven foreign trade enterprise with independent R&D capabilities, HiSiaddi has repeatedly resolved customized product demands from clients by leveraging technical cooperation with manufacturing plants and precise insight into market needs. Below is a real customized sulfolane project case delivered by HiSiaddi.
Contact HiSiaddi customer service for inquiries about further customized service solutions.
Client: A German fine chemical group (hereinafter referred to as Group K) Industry: High-end pharmaceutical intermediates & specialty electronic chemicals Market Position: Internationally renowned brand supplying pharmaceutical factories and semiconductor manufacturers across Europe and the United States Product Demand: Electronic-grade high-purity sulfolane for photoresist strippers and synthesis of ultra-pure pharmaceutical intermediates Extremely stringent quality specifications: Purity ≥99.95%, single metal ion ≤1ppb, water content ≤50ppm, complete absence of mercaptan odor, consistent color difference across batches Mandatory certifications: REACH, RoHS, FDA Packaging requirements: 200L UN-certified anti-static steel drums lined with PTFE, customized English labels, traceable batch numbers Delivery requirements: Small-batch multi-lot shipments, delivery within 4 weeks, stable annual supply
Group K previously sourced materials from Japanese and Korean suppliers, yet encountered persistent pain points:
· Japanese and Korean manufacturers refused customized purification, resulting in metal ion levels ranging from 3 to 5ppb, which caused unstable yield of the client’s end products
· Fixed packaging formats incompatible with their automatic filling lines
· Annual price hikes and extended lead times
For this reason, Group K turned to Chinese suppliers in 2023, seeking partners capable of customized production, strong technical support and stable supply capacity.
Core Business: Export of high-purity solvents, electronic chemicals and specialty chemical raw materials Core Advantages: Deep strategic cooperation with high-purity sulfolane manufacturers in Liaoning and Shandong provinces to develop customized purification processes In-house Quality Testing Laboratory: Equipped with GC, ICP-MS, Karl Fischer moisture tester and colorimeter Full Qualifications: Hazardous chemical export credentials, UN packaging certification, REACH registration agency service Technical Team: Chemical master degree holders and senior foreign trade specialists capable of direct communication with client R&D and QA departments
1. Excessive metal ion content: Japanese/Korean products measure 3–5ppb, while the client enforces a strict cap of ≤1ppb, which otherwise destabilizes photoresist performance
2. Trace impurity odor: Standard industrial-grade sulfolane carries faint mercaptan odor, a disqualifying factor for pharmaceutical-grade applications
3. Mismatched packaging: Automatic filling lines require customized drum calibers, sealing structures and label placement
4. Poor batch consistency: Fluctuations in color and water content across batches force frequent adjustments to the client’s production process
5. Cumbersome certification documentation: Full sets of English documents including CoA, COO, REACH, RoHS and FDA DMF are mandatory
Partnering with domestic high-purity sulfolane manufacturers, HiSiaddi upgraded the original 99.9% industrial-grade production line with additional processes:
· Secondary high-vacuum distillation to remove light components and mercaptan impurities
· Special chelating resin column for deep metal removal, reducing Fe, Na, K, Ca levels from 5ppb to ≤0.8ppb
· Sealed filtration under nitrogen protection to eliminate moisture and secondary contamination
Three small trial batches were produced and fully tested via ICP-MS, full GC-MS impurity scanning and blind odor testing. Mass production was only launched after all indicators passed inspection.
· Drums: 200L UN-certified anti-static steel drums lined with PTFE, food-grade sealing gaskets
· Drum outlet: DN50 quick coupling specified by the client to match automatic filling guns
· Labels: Bilingual English-German labels with QR traceability codes, fully marked batch number, purity, metal ion content, water content and production date
· Outer packaging: IPPC fumigated wooden pallets wrapped with moisture-proof film, hazard labels compliant with European ADR regulations
· 100% full inspection for every batch: Purity, moisture, acidity, chromaticity, 12 metal ion items, GC-MS impurity spectrum and odor test
· Exclusive dedicated batch coding system enabling full lifecycle traceability
· Restricted inter-batch deviation: Color difference ≤5 APHA, water content fluctuation ≤10ppm, eliminating frequent production parameter adjustments for the client
HiSiaddi provides complete paperwork:
· Batch-specific English CoA, COO, EU-compliant MSDS
· REACH registration files, RoHS declaration of conformity, FDA DMF supporting documents
· Direct liaison with client QA teams to format all documents compatible with their internal management system for one-time approval
· First order: 50 tons (2×25 tons) delivered within 4 weeks
· Recurring orders: 20–30 tons monthly split into 2–3 shipments with independent test reports for each lot
· Logistics: Dedicated hazardous chemical containers, temperature-controlled transport, full GPS tracking, destination port customs clearance assistance
· Quality compliance: Stable metal ion content ≤0.8ppb with zero odor, lifting the yield of end products by 3%
· Perfect packaging compatibility: Automatic filling efficiency increased by 15% with zero leakage or contamination incidents
· Consistent batch performance: 12 production batches delivered within a year with minimal indicator fluctuations, removing the need for repeated process adjustments
· Streamlined certification review: Documents passed European and American audits at first submission, drastically cutting QA communication costs
· Cost & lead time advantage: 12–15% lower pricing than Japanese/Korean suppliers, with lead times shortened by 2 weeks
Quote from Group K’s Procurement Director (translated from original English): “You are the most professional high-end chemical supplier we have ever collaborated with from China. You do not merely sell products, but deliver customized integrated solutions—something we could never obtain from Japanese and Korean vendors.”
Subsequent Cooperation Milestones:
· 2024: Annual order volume exceeded 300 tons
· 2025: Cooperation expanded to pharmaceutical-grade NMP, high-purity γ-butyrolactone and other solvents
· Group K incorporated HiSiaddi into its global strategic supplier roster and shared partial R&D data with the team
This client is not a low-end trader focused solely on pricing, but an internationally renowned premium brand with extremely strict requirements for quality, stability, certification and technical service. The project is far more than simple off-the-shelf product resale and private labeling; it involves in-depth customization of production processes, packaging, quality standards and after-sales technical support. This case demonstrates China’s chemical export industry’s upgrade from price competition to technology and service-driven competition, winning long-term trust from top-tier international clients.
Contact HiSiaddi customer service for inquiries about further customized service solutions.
+86-13120989737 
info@hisiaddi.com 
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