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72049

Sigma-Aldrich

Sodium thiosulfate

purum p.a., anhydrous, ≥98.0% (RT)

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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

grade

purum p.a.

assay

≥98.0% (RT)

form

crystals

pH

6.0-8.5 (25 °C, 50 mg/mL in H2O)

anion traces

sulfide (S2-): ≤50 mg/kg

cation traces

Ca: ≤50 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤50 mg/kg
K: ≤500 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

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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1 of 4

This Item
2172631.06512563188
vibrant-m

72049

Sodium thiosulfate

vibrant-m

217263

Sodium thiosulfate

vibrant-m

1.06512

Sodium thiosulfate

vibrant-m

563188

Sodium thiosulfate

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

100

form

crystals

form

powder, crystals or chunks

form

solid

form

powder

anion traces

sulfide (S2-): ≤50 mg/kg

anion traces

-

anion traces

sulfide (S2-): ≤0.002%

anion traces

-

cation traces

Ca: ≤50 mg/kg, Co: ≤50 mg/kg, Fe: ≤50 mg/kg, Ni: ≤50 mg/kg, Zn: ≤50 mg/kg, Cd: ≤50 mg/kg, K: ≤500 mg/kg, Cu: ≤50 mg/kg, Pb: ≤50 mg/kg

cation traces

-

cation traces

Fe: ≤0.005%, heavy metals (as Pb): ≤0.005%

cation traces

-

grade

purum p.a.

grade

-

grade

-

grade

-

General description

The product is anhydrous sodium thiosulfate (Na2S2O3). It can be obtained from Na2S2O3.10H2O by heating above 100°C. It can be synthesized from sodium sulfate.

Application

Sodium thiosulfate (Na2S2O3) may be used in the following studies:
  • Industrial synthesis of methylene blue.
  • Quantitative estimation of elemental iodine by titrimetry.
  • Detection of trace levels of cysteine by employing triangular silver nanoplates (TAg-NPs).

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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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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