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About This Item
Linear Formula:
Na2S2O3
CAS Number:
Molecular Weight:
158.11
EC Number:
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.21
Form:
crystals
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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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 Code
13 - Non Combustible Solids
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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