Zhejiang Tianrui Chemical Co., Ltd. situated in south industrial zone of Longyou county, Zhejiang province, China, is a high-tech enterprise, specializing in R & D, production, sales and technical services of L-Theanine, L-Pyroglutamic acid, L-Glutamic acid etc.

Our plant is designed, built and operated according to the standards of pharmaceutical enterprises. Perfect quality control and quality assurance systems are established in accordance with ICH Q7 Guidelines. Our company are ISO22000 and ISO14001 certified. Our products obtained USP, HACCP, KOSHER, HALAL and other...