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Potassium thiosulfate

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  • Name Potassium thiosulfate
  • EINECS233-666-8
  • CAS No. 10294-66-3
  • Density1.484 g/mL at 25 °C
  • PSA103.66000
  • LogP0.50980
  • SolubilityN/A
  • Melting PointN/A
  • FormulaK2O3S2
  • Boiling PointN/A
  • Molecular Weight190.32
  • Flash PointN/A
  • Transport InformationN/A
  • Appearancewhite crystalline powder
  • Safety26-36
  • Risk Codes36/38
  • Molecular Structure
    Molecular Structure of 10294-66-3 (Potassium thiosulfate)
  • Hazard SymbolsIrritantXi
  • SynonymsIrritantXi

Potassium thiosulfate Chemical Properties

Molecular structure of Potassium thiosulphate (CAS NO.10294-66-3):

Molecular Weight: 190.3248 g/mol
Molecular Formula: K2O3S2 
Density: 1.484 g/mL at 25 °C
Stability: Stable. Incompatible with strong acids, strong oxidizing agents.
H-Bond Acceptor: 3
Exact Mass: 189.856299
MonoIsotopic Mass: 189.856299
Topological Polar Surface Area: 63.2
Heavy Atom Count: 7 
Canonical SMILES: [O-]S(=O)(=S)[O-].[K+].[K+]
InChI: InChI=1S/2K.H2O3S2/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2
InChIKey: FGRVOLIFQGXPCT-UHFFFAOYSA-L
EINECS: 233-666-8
Product Categories: Inorganics;Inorganic Salts;Potassium;Synthetic Reagents

Potassium thiosulfate Uses

 Potassium thiosulphate (CAS NO.10294-66-3) is used as analytical reagent and reducing agent, but also for the pharmaceutical industry.

Potassium thiosulfate Consensus Reports

Reported in EPA TSCA Inventory.

Potassium thiosulfate Safety Profile

When heated to decomposition it emits toxic fumes of SOx and K2O.
Hazard Codes of Potassium thiosulphate (CAS NO.10294-66-3): IrritantXi
Risk Statements: 36/38
36/38: Irritating to eyes and skin 
Safety Statements: 26-36
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36: Wear suitable protective clothing

Potassium thiosulfate Specification

 Potassium thiosulphate (CAS NO.10294-66-3) is also named as Thiosulfuric acid (H2S2O3), dipotassium salt ; Thiosulfuric acid (H2S2O3), potassium salt (1:2) . It is white crystalline powder.

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