Thiosulfate

Thiosulfate
Names
	IUPAC names Sulfurothioate; Trioxidosulfidosulfate(2−); Trioxido-1κ3O-disulfate(S—S)(2−);
Identifiers
CAS Number	14383-50-7 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:16094;
ChemSpider	1054;
PubChem CID	1084;
UNII	LLT6XV39PY ;
CompTox Dashboard (EPA)	DTXSID80932118 ;
	InChI InChI=1S/H2O3S2/c1-5(2,3)4/h(H2,1,2,3,4)/p-2 Key: DHCDFWKWKRSZHF-UHFFFAOYSA-L;
	SMILES [O-]S(=O)(=O)[S-];
Properties
Chemical formula	S2O2−3
Molar mass	112.12 g·mol−1
Conjugate acid	Thiosulfuric acid
Related compounds
Related compounds	Sulfates; Pyrosulfates; Dithionates; Metabisulfites; Bisulfites; Sulfites; Dithionites; Tetrathionates;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Thiosulfate (IUPAC-recommended spelling; sometimes thiosulphate in British English) is an oxyanion of sulfur with the chemical formula S₂O2−3. Thiosulfate also refers to the compounds containing this anion, which are the salts of thiosulfuric acid, such as sodium thiosulfate (Na₂S₂O₃) and ammonium thiosulfate ((NH₄)₂S₂O₃). Thiosulfate salts occur naturally. Thiosulfate rapidly dechlorinates water, and is used to halt bleaching in the paper-making industry. Thiosulfate salts are mainly used for dyeing in textiles, and bleaching of natural substances.