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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 ...