Introduction:
Thiourea
Dioxide (TDO or TUD) is also named as Formamidine Sulfinic Acid. Its
appearance is white crystal powder. Thiourea Dioxide is a stable
compound with no strong reducing and oxidizing ability, and its
dissolvability is 26.7g/l (20 oC),while its PH is 5.0 in saturated
solution. Thiourea Dioxide (TDO) appears terrific stable even in 20oC
-30oC solution, but when it is under heat or catalysesing by alkali,
it decomposes gradually to produce sulfoxylic acid through formamidine
sulfinic acid to exhibit a reducing action.
Thiourea 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.
