72049
Sodium thiosulfate
purum p.a., anhydrous, ≥98.0% (RT)
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About This Item
Linear Formula:
Na2S2O3
CAS Number:
Molecular Weight:
158.11
NACRES:
NA.21
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
231-867-5
MDL number:
Assay:
≥98.0% (RT)
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
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).
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Storage Class
13 - Non Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
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Eagleson M.
Concise Encyclopedia Chemistry, 648-648 (1994)
Xin Yan Hou et al.
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
Eagleson M.
Concise Encyclopedia Chemistry, 542-542 (1994)