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Zhangjiagang Dongchang Chemical Co., Ltd. is located in the Dongsha Chemical Industrial Concentration Zone, Leyu Town, Zhangjiagang City, Suzhou, Jiangsu Province. It borders the Yangtze River to the north, and is 150 kilometers from Shanghai, 100 kilometers from Suzhou, 25 kilometers from downtown Zhangjiagang, 20 kilometers from the Yanjiang Expressway, and 15 kilometers from National Highway 204. The company was established in October 1995. Originally known as Zhangjiagang Dongchang Chemical Plant, it was restructured into Zhangjiagang Dongchang Chemical Co., Ltd. in 2000. It is primarily a chemical enterprise specializing in phosphorus-based products. The company's water, electricity, and gas facilities are uniformly supplied by the Dongsha Chemical Industrial Concentration Zone. The presence of a sewage treatment plant and a fire brigade within the zone ensures effective safety production and environmental protection. The company covers an area of 30,000 square meters, with a building area of 7,400 square meters, and currently employs 116 people.

The company's main products include: phosphorus oxychloride, phosphorus trichloride, phosphorus pentoxide, 5-chlorosalicylic acid, niclosamide, chloroacetaldehyde, 2-aminothiazole hydrochloride, and anhydrous sodium acetate.

By-products include: hydrochloric acid, flame retardants, and valine.