TDO is a new kind of reducing agent that used as exchange of sodium hydrosulfite. It iswidely used in textile and paper making industry. This product is also used in leatherprocessing industry, paper, pulp and board industry, photographic industry, bleaching andreducing agents. This product is also a component of decolorisation agents. Inmacromolecule material industry, it is used as catalysis agent and stabilizer of resinicproducing, and it is also used in organic synthesization of sensitizing material, andmedicine, medical, spicery materials in fine chemicals, and also can be applied in therecycling and separating of heavy metals.