Shanghai Hai Fu Chemical Co., Ltd. Founded in 1994, a Sino-foreign joint venture, mainly manufactures sulfamic acid with output 15000MT per year. The company is the largest manufacturers in producing sulfamic acid in China, and can provide our customer with all kinds of packages of the product.And also, we can supply the following product:Oxalic Acid, Sodium percarbonate, Sodium Metabisulfite, Sodium Thiosulfate and so o