Thiosulfate

Thiosulfate
The structure of the thiosulfate anion
A space-filling model of the thiosulfate anion
Names
IUPAC names
  • Sulfurothioate
  • Trioxidosulfidosulfate(2−)
  • Trioxido-1κ3O-disulfate(S—S)(2−)[1]
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
UNII
  • InChI=1S/H2O3S2/c1-5(2,3)4/h(H2,1,2,3,4)/p-2
    Key: DHCDFWKWKRSZHF-UHFFFAOYSA-L
  • [O-]S(=O)(=O)[S-]
Properties
S2O2−3
Molar mass 112.12 g·mol−1
Conjugate acid Thiosulfuric acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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.[2]

  1. ^ International Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSC–IUPAC. ISBN 0-85404-438-8. pp. 139,329. Electronic version.
  2. ^ Cite error: The named reference Ullmann was invoked but never defined (see the help page).