Wuxi Jinghai Amino Acid Co., Ltd.

Wuxi Jinghai Amino Acid Co., Ltd., which sells under the Aminowill brand, was founded in 1995 and is headquartered at Wuxi, Jiangsu province. It makes more than 30 pharmaceutical-grade and food-grade amino acids by bio-fermentation, with large-scale output of L-isoleucine, L-valine, L-leucine and L-histidine, and a wider catalogue that includes L-arginine, L-glutamic acid, L-phenylalanine, L-proline, L-serine and branched-chain amino acid blends.

Two production bases sit in Donggang Town, Xishan district, Wuxi, with more than 400 employees, several independent fermentation and extraction lines, and seven fully automatic amino acid lines. A new workshop was commissioned in 2025, which the company states doubled capacity. Separation and purification technology is used to control metal content, endotoxins and microbial counts for customers with tighter specifications.

The quality system is built to GMP and ICH guidelines. Certification covers ISO 9001, ISO 14001, ISO 45001, ISO 50001, FSSC 22000, EU Certificates of Suitability for isoleucine and valine, Kosher and Halal, and product specifications are held against CP, EP, USP, JP, FCC and GB. The company states it was the first Chinese firm certified for pharmaceutical API GMP, that it passed a US FDA inspection with zero deficiencies, and that it passed a Korean MFDS on-site inspection with zero defects in 2025. It listed on the Beijing Stock Exchange in 2023, has drafted several national and industry standards, and exports to Europe, the Americas, Japan and South Korea.