Thiourea dioxide, also known as thiourea dioxide, is an organic compound with the chemical formula CH4N2O2S and a molecular weight of 116.12 g/mol. It is a white or slightly yellow crystalline solid with good solubility in water.

Thiourea dioxide has reducing properties and can be used as a bleaching agent, decolorizing agent, and dye reducing agent, among other applications. It can also be used in electroplating, metal surface treatment, and chemical analysis. In addition, thiourea dioxide can be used to prepare other compounds, such as carbon disulfide and imidazole.

It should be noted that thiourea dioxide has an irritating effect on the skin and eyes and should be avoided from direct contact. Appropriate protective equipment should be worn during use, and safety procedures should be followed.