HiSiaddi is an innovative foreign trade service provider driven by technology transformation and export business. We have established a "1+2+3+4=1" service system and can supply ATBC tributyl acetylcitrate sourced from multiple well-known original manufacturers. As a foreign trader with R&D capabilities, HiSiaddi has repeatedly resolved customized ATBC product demands for clients through technological cooperation with manufacturers and precise market insight. Below is a case illustrating how we delivered customized ATBC solutions.
Contact HiSiaddi customer service for more customized service support.
Purchaser: GERMED MedPlast GmbH, based in the medical industrial park of North Rhine-Westphalia, Germany. With 26 years of expertise in premium sterile medical PVC consumables, the company produces disposable sterile infusion tubes, medical sputum suction tubes, and infant indwelling needle sheaths. Its products are supplied to top-tier local German hospitals and leading European medical device groups. All raw materials comply with EU REACH, EU 10/2011, German LFGB, and USP pharmacopoeia excipient standards. The annual ATBC demand stands at 78 tons.
Previously, the client exclusively imported Eastman Citroflex A4 ATBC plasticizer. However, continuous price hikes for overseas raw materials and extended lead times of up to 90 days prompted the client to launch a localization substitution project for Chinese ATBC. Conventional mass-produced ATBC meeting national standards failed to match the special formulation requirements of the client’s medical products. Most domestic general manufacturers were unwilling to invest in production line technical transformation for customized small-batch orders. Samples from multiple manufacturers presented three persistent defects: precipitation after high-temperature sterilization, brittle pipes at low temperatures, and faint peculiar odor post-sterilization. The client entrusted HiSiaddi with full-cycle R&D and mass production of tailor-made ATBC.
1. Acid value ≤0.03mgKOH/g (national standard premium grade cap: ≤0.05) – inhibits water hydrolysis and precipitation during 121°C high-pressure steam sterilization.
2. Platinum-cobalt color ≤15 (mainstream commercial grade cap: ≤20) – ensures high transparency of medical pipes without yellowing.
3. Volatile weight loss ≤0.3% (general products: 0.8%~1.2%) – eliminates small-molecule volatile residues after ethylene oxide sterilization and maintains pipe flexibility at -25°C storage. Additional requirements: Heavy metal-free production with negligible alcohol residues; full LFGB + USP medical test reports and complete REACH registration dossiers.
Two bottlenecks plague mainstream domestic ATBC manufacturers:
· Large-scale mass producers adopt fixed continuous production lines with high modification costs and refuse customized small-batch production.
· Small refined manufacturers possess R&D capacity but lack supporting EU compliance resources, export declaration channels, and authoritative third-party testing capabilities.
After two months of independent sourcing yielded no viable solutions, the client’s customization project stalled.
HiSiaddi assembled a team of formulation engineers, production process coordinators, EU compliance specialists, and third-party testing liaisons. We screened two domestic high-end ATBC manufacturers equipped with molecular distillation purification technology (Shandong Langhui and Jiangsu Ruijia) and designated Jiangsu Ruijia as the exclusive customized production plant. The development was completed in four phases:
Based on the client’s PVC medical compound formula (high-polymerization medical PVC resin, calcium-zinc stabilization system), we identified root causes of defects in generic ATBC: residual free acid and butanol small molecules from incomplete acetylation trigger hydrolysis precipitation during high-temperature sterilization; high impurity content from crude distillation causes yellowing under heat. Collaborating with the factory’s R&D department, we revised full production workflows: ① Adopt food-grade high-purity citric acid and rectified n-butanol in esterification to control byproduct generation; ② Extend heat preservation reaction duration in acetylation to reduce free acetic acid residues; ③ Add a third short-path molecular distillation stage on top of the original two-stage rectification to strip trace free alcohols and low-molecular impurities, meeting ultra-low volatility and ultra-low acid value targets.
1. First batch sample: Optimized rectification process, acid value reduced to 0.038mgKOH/g, volatility 0.42%, low-temperature performance qualified; acid value slightly exceeded the limit.
2. Second batch fine-tuning: Adjusted acetylation catalyst ratio and vacuum distillation negative pressure, stabilizing acid value ≤0.027mgKOH/g, color 14#, volatility 0.31%.
3. Third batch 500kg pilot trial: All indicators finalized – acid value 0.026mgKOH/g, color 13#, volatility 0.28%, all superior to the client’s upper customized limits.
HiSiaddi coordinated SGS laboratories accredited by Germany to conduct full testing per German LFGB, EU 10/2011, and USP medical excipient standards, issuing bilingual traceable test reports in Chinese and English. Simultaneously, we compiled medical-grade exclusive SDS under EU CLP regulations, completed full REACH substance dossiers and EU OR only representative filing, and assembled all qualification documents required for German pharmaceutical warehouse registration.
Medical raw materials require light-proof and moisture-proof storage. We replaced standard 220kg iron drums with customized galvanized rustproof light-proof drums lined with food-grade PE inner film, printed with bilingual exclusive grade labels (MED-ATBC-01 Medical Custom Grade) to comply with German pharmaceutical warehouse specifications.
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22-Day German Laboratory Formulation Verification HiSiaddi delivered MED-ATBC-01 custom samples to the client’s German laboratory. After blending with the client’s proprietary medical PVC formula and extruding pipes, full testing including 121°C high-pressure steam sterilization, 72h low-temperature storage at -25°C, and ethylene oxide sterilization was completed. The pipes exhibited no precipitation, no peculiar odor, and no cracking under low-temperature bending, with finished product performance fully matching Eastman’s original Citroflex A4.
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8-Ton Initial Trial Shipment Split into Two Batches The 8-ton trial order was split into two shipments declared and exported from Shanghai Port to Germany. Upon arrival, four medical pipe production lines ran continuously for 10 days. Finished products passed one-time inspection by local German drug authorities with a stable 100% yield rate.
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Signing of 78-Ton Annual Framework Contract After successful trial acceptance, a long-term annual procurement contract for 78 tons was signed, with balanced monthly deliveries of 6–8 tons. Compared with original US imports, overall procurement costs dropped by 32%, and sea freight lead time was shortened from 90 days to 32 days.
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1. Drawing on data from this medical customized grade, HiSiaddi assisted the manufacturer in establishing internal control standards for medical-grade ATBC. The MED-ATBC-01 grade later secured two additional high-end medical plastic clients in Austria and the Netherlands.
2. The client subsequently launched a premium medical beauty hose project and entrusted HiSiaddi to develop low-migration modified ATBC, forming a long-term strategic partnership for customized raw material development.
3. Leveraging experience serving German high-end clients, the manufacturer completed domestic medical-grade ATBC registration and filing, gaining access to supply chains of top domestic medical device enterprises.
1. Most domestic ATBC manufacturers focus on mass production of general food-grade products with fixed production line processes, refusing technical transformation for custom orders due to cost concerns. Personalized indicators required by overseas high-end medical and infant-grade clients are hard to fulfill, a widespread industry pain point.
2. HiSiaddi’s core value lies in covering the full chain: translating customized client parameters, coordinating factory technical retrofits, iterating multiple sample batches, arranging international authoritative testing, preparing cross-border compliance documents, and managing export customs clearance. We act as a technical and commercial bridge between high-end overseas clients and manufacturers to deliver non-standard exclusive customized grades.
3. For high-end European and American medical procurement, unit price is not the sole priority; customized processing, exclusive product grades, and supporting compliance services are core prerequisites for adopting domestic raw materials.
Contact HiSiaddi customer service for more customized service support.
+86-13120989737 
info@hisiaddi.com 
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