| IUPAC name
| Other names
Formamidine sulfinic acid
|Molar mass||108.12 g/mol|
|Appearance||White or slight yellowish solid|
|Melting point||126 °C (259 °F; 399 K) (decomposes)|
|3.0 g/100 mL|
|Safety data sheet||Sigma-Aldrich|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Thiourea dioxide (CH4N2O2S) is an organosulfur compound that is used as reductive bleaching in the textile industry. The compound exhibits tautomerism.
Thiourea dioxide can be used to reduce ketones to secondary alcohols.
Thiourea dioxide is a white solid, poorly soluble in water.
Thiourea dioxide is sold by lab suppliers.
- (NH2)2CS + 2 H2O2 → (NH)(NH2)CSO2H + 2 H2O
Chlorine dioxide can also be used.
- Reduction of aromatic nitroaldehydes and nitroketones to nitroalcohols
Thiourea dioxide is not very toxic, but it is irritating to skin and mucous membranes.
In closed bottles.
Thiourea dioxide can be strongly diluted with water and poured down the drain.
Heating it in a kiln/oven is another possibility, as the decomposition produces carbon dioxide, sulfur dioxide, nitrogen, ammonia.
- Sullivan; Hargreaves; Acta Crystallographica; vol. 15; (1962); p. 675