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217263

Sigma-Aldrich

Sodium thiosulfate

ReagentPlus®, 99%

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Linear Formula:
Na2S2O3
CAS Number:
Molecular Weight:
158.11
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

Quality Level

product line

ReagentPlus®

Assay

99%

form

powder, crystals or chunks

pH

6.0-8.5 (20 °C, 50 g/L)

SMILES string

[Na+].[Na+].[O-]S([O-])(=O)=S

InChI

1S/2Na.H2O3S2/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2

InChI key

AKHNMLFCWUSKQB-UHFFFAOYSA-L

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This Item
72049563188909173
Sodium thiosulfate ReagentPlus®, 99%

Sigma-Aldrich

217263

Sodium thiosulfate

Sodium thiosulfate purum p.a., anhydrous, ≥98.0% (RT)

Sigma-Aldrich

72049

Sodium thiosulfate

Sodium thiosulfate ≥99.99% trace metals basis

Sigma-Aldrich

563188

Sodium thiosulfate

Sodium thiosulfate free-flowing, Redi-Dri™, ReagentPlus®, 99%

Sigma-Aldrich

909173

Sodium thiosulfate

form

powder, crystals or chunks

form

crystals

form

powder

form

powder

pH

6.0-8.5 (20 °C, 50 g/L)

pH

6.0-8.5 (25 °C, 50 mg/mL in H2O)

pH

-

pH

6-8.5 (20 °C, 50 g/L)

product line

ReagentPlus®

product line

-

product line

-

product line

ReagentPlus®, Redi-Dri

General description

Sodium thiosulfate is an inorganic salt composed of thiosulfate and sodium ion with the chemical formula Na2S2O3. It is general reducing agent and useful sulfur source in synthetic chemistry

Application

Applied in a widely useful, thiosulfate-assisted, synthesis of a variety of diamine-CuCN complexes.
Sodium thiosulfate can be used as a
  • Component in the synthesis of unsymmetrical aryl sulfides under aqueous conditions, where C–S–C bond formed in presence of other two components (alcohols and organohalides).
  • Reagent for the activation of carbon material.
  • Reagent in the synthesis of S-glycosyl thiosulfates (glycosyl bunte salts) by direct condensation of unprotected sugars using dehydrating agent DMC (2-chloro-1,3-dimethylimidazolinium chloride) in water-acetonitrile solvent mixture.
  • Reagent with alkyl halide in the synthesis of Bunte salts by SN2 mechanism using Cu catalyst.
  • Reagent in the synthesis of aryl thiols from aryl halides by palladium catalyzed cross-coupling reaction.

Features and Benefits

Sodium thiosulfate is:
  • Stable
  • Environmentally friendly
  • Odorless
  • Inexpensive.

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 125, 285-289 (2014-02-22)
In this study, triangular silver nanoplates (TAg-NPs) were used to detect trace Cysteine concentration in the presence of sodium thiosulfate (Na2S2O3). Study showed that the TAg-NPs could be gently etched by Cysteine with the concentration of 1.0×10(-7) mol L(-1) through
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