Hongye chemical co., ltd. is the leading professional manufacturer and supplier of thiourea dioxide and pulp bleaching agent fas in the world. we can produce 50000mt thiourea dioxide(formamidine sulfinic acid) and bleaching agent fas per year. \nthiourea dioxide (tdo) is a new kind of reducing agent that used as exchange of sodium hydrosulfite. it is widely used in textile and paper making industry. this product is also used in leather processing industry, paper, pulp and board industry, photographic industry, bleaching and reducing agents. this product is also a component of decolorisation agents. in macromolecule material industry, it is used as catalysis agent and stabilizer of resinic producing, and it is also used in organic synthesization of sensitizing material, and medicine, medical, spicery materials in fine chemicals, and also can be applied in the recycling and separating of heavy metals.\nother name: formamidine sulfinic acid, amino imino methanesulfinic acid \n1. specification:\npurity: 99.%min\nthiourea: 0.10%max\nmoisture:0.05%max\niron(fe):10ppm max\nsulphate: 0.17%max\n2. packing: \na.500kg and 1000kg container bags.\nb.25kg or 50kg plastic bags.\nc. 100kg or 160kg drums.\nd. 25kg kraft paper compound plastic bags.\ne.50kg fiber drums.\n