Ammonium thiosulfate

Ammonium thiosulfate (ammonium thiosulphate in British English) is an inorganic compound with the formula [NH4]2S2O3. It is white crystalline solid with ammonia odor, readily soluble in water, slightly soluble in acetone and insoluble in ethanol and diethyl ether.

Ammonium thiosulfate
Names
IUPAC name
Diammonium thiosulfate
Other names
Ammonium thiosulphate, ATS
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.074
PubChem CID
UNII
  • InChI=1S/2H3N.H2O3S2/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4) Y
    Key: XYXNTHIYBIDHGM-UHFFFAOYSA-N Y
  • InChI=1S/2H3N.H2O3S2/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4)
SMILES
  • [O-]S([O-])(=O)=S.[NH4+].[NH4+]
Properties
[NH4]2S2O3
Molar mass 148.20 g·mol−1
Appearance colorless or white, hygroscopic solid
Density 1.679 g/cm3
Melting point decomposes at 100 °C
173 g/100 mL (20 °C)
Solubility slightly soluble in acetone
insoluble in alcohol
Structure
monoclinic
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)
 2980 mg/kg (rat, oral)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references
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