HiSiaddi is an innovative foreign trade service provider driven by both technology transformation and foreign trade operations. It has established a "1+2+3+4=1" service system and can supply original factory products of well-known brands for N-Cyclohexyl-2-pyrrolidone. As a technology R&D-oriented foreign trade service provider, HiSiaddi has repeatedly collaborated with manufacturers on technology conversion and accurately captured market demands, frequently addressing customized product requirements from customers for N-Cyclohexyl-2-pyrrolidone. Below is a case demonstrating how HiSiaddi resolved customized demands for N-Cyclohexyl-2-pyrrolidone.
Contact HiSiaddi customer service for more customized service inquiries.
The customer specializes in formula R&D of stripping solutions for high-end LCD and automotive chip photoresists, with products supplied to Samsung and LG semiconductor factories. CHP (N-Cyclohexyl-2-pyrrolidone, CAS: 6837-24-7) is used as a special compound solvent for photoresist stripping, with an annual customized procurement volume of 62 tons. Previously, the customer long purchased refined CHP from Ashland (USA). Due to surging overseas raw material prices, prolonged ocean shipping lead times, and refusal to accept small-batch modified customization orders, the customer planned to source domestically manufactured special-specification products in China.
Mandatory customized specifications set by the customer: Purity ≥99.95%, water content ≤50ppm, cyclohexylamine residue <10ppm, color ≤10 APHA, metal ions (Fe/Cu/Pb) <10ppb; trace anti-yellowing additives shall be added additionally to prevent discoloration under high-temperature heating. Conventional industrial-grade and general pharmaceutical-grade CHP available on the market fail to meet all formula standards.
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Domestic conventional manufacturers only mass-produce standard products and refuse special customization Mainstream domestic CHP manufacturers mass-produce general national standard products with purity ranging from 99.0% to 99.5% via continuous large-scale production lines. Adjusting rectification processes and adding special additives require separate formula modification and rectification packing replacement, incurring high R&D and sample testing costs for individual factories. Multiple leading manufacturers directly rejected small-batch modified customization, only able to supply off-the-shelf standard models. When fed into production lines, these products caused issues such as yellowing of stripping solutions under high temperature, incomplete dissolution of photoresist residues, and micro-corrosion on chip metal surfaces.
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The customer lacks knowledge of domestic synthesis and rectification processes and cannot provide implementable technical transformation parameters The customer only provided end-product application indicators without understanding the synthesis of CHP (catalytic condensation of γ-butyrolactone and cyclohexylamine) and precision rectification purification principles, making it impossible to guide manufacturers in process optimization. Independent coordination with 3 manufacturers yielded 5 consecutive unqualified sample tests, halting R&D and risking production line shutdown due to raw material shortages.
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No manufacturers undertake supporting customized services: Special UN-certified packaging, batch-by-batch COA, and pre-notification for South Korea K-REACH Production factories only deliver finished products without supporting customized labels, high-purity light-proof UN drum packaging, batch-by-batch third-party SGS full testing, and pre-compliance review for South Korean customs entry. The customer would incur high separate costs if engaging independent compliance service providers, so they urgently entrusted HiSiaddi with full responsibility for formula customization, process implementation, production control, and compliant shipment.
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Leveraging its supply chain resources, HiSiaddi screened 2 refined chemical factories with long-term experience in high-end pyrrolidone refining, excluding bulk commodity chemical manufacturers. Together with factory R&D engineers, we optimized processes from the source against customer indicators:
· Synthesis stage: Adopt highly selective catalysts to reduce by-product cyclohexylamine generation and control free amine residues at the source;
· Rectification stage: Install a three-stage negative-pressure precision rectification tower equipped with special molecular sieve packing to separate water and heavy metal impurities in sections;
· Post-treatment: Add food-grade compound anti-yellowing additives specified by the customer at low temperature during the finished product stage with strict dosage control to resolve high-temperature discoloration.
① First batch: Basic high-purity rectified CHP with purity 99.92%, water content 82ppm, excessive metal ions; ② Second batch: Optimize rectification reflux ratio to reduce water content to 42ppm, yet slight yellowing occurred after standing at 60°C for 48 hours under high temperature; ③ Third batch: Precisely proportion customized anti-yellowing additives, achieving compliance with all indicators: purity 99.97%, water content 38ppm, free cyclohexylamine 7.2ppm, all heavy metals <7ppb, color 8 APHA. The customer conducted small-scale machine tests in South Korean laboratories, and stripping solution performance matched original Ashland products.
1. Agree with the factory to allocate an independent batch refining small production line exclusively for this customized CHP grade, isolated from general product lines to avoid cross-contamination;
2. Adopt light-proof internally coated UN-certified metal drums (distinct from ordinary plastic drums on the market), with full Korean + English GHS customized labels printed on drums to comply with South Korean hazardous chemical warehousing standards.
HiSiaddi coordinates SGS to issue batch-by-batch COA and 16-item English GHS SDS in accordance with Korean enterprise standards, and completes pre-registration notification of CHP under South Korea K-REACH in advance, eliminating separate compliance declaration cycles and costs for the customer.
1. First order delivery: The first batch of 16 tons of customized CHP was shipped on schedule, cleared customs smoothly upon arrival in South Korea, and put into photoresist stripping production lines, with product yield equal to imported raw materials;
2. Annual framework contract signed: 62 tons total annual volume scheduled for production and delivery in 4 batches, with comprehensive raw material procurement costs reduced by 33% compared to original US imports;
3. Long-term exclusive partnership: The customer later added modified CHP grades for OLED special cleaning solvents, all entrusted exclusively to HiSiaddi for customized procurement;
4. Derivative cooperation: Based on this customization capability, the customer also entrusted HiSiaddi with localized customized sourcing of high-purity pyrrolidone series products including NMP.
The core demand of high-end Japanese and Korean semiconductor customers is not simply purchasing off-the-shelf raw materials, but formula implementation, exclusive customization, and full-chain supporting services. Raw material manufacturers focus on mass production profitability and resist non-standard process adjustments. Relying on triple resources in process technology, supply chain, and compliance, HiSiaddi bridges the technical and implementation gaps between manufacturers and end customers, forming differentiated core competitiveness.
Contact HiSiaddi customer service for more customized service inquiries.
+86-13120989737 
info@hisiaddi.com 
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