Tianjin Chengyi International Trading Co., Ltd, established in 1999, is a chemical and pharmaceutical company, and now become the sole marketer of the Oxalic Acid & derivatives and other products produced around the world.Our products include agrochemicals,feed additives,food ingredients,industrial chamicals,personal care and pharmaceuticals, API for human, veterinary, excipients. We have three warehouses operations in Xingang, Qingdao and Shanghai while five liaison offices in Netherlands, Sweden, USA, Canada and Brazil. All of our approved suppliers are audited by our QA department according ISO, GMP, EHS, and all of the products supplied to our clients are sampled & tested by our QC department.Welcome to establish business relationship with us.