Description
72049 Sigma-Aldrich
Sodium thiosulfate
purum p.a., anhydrous, ≥98.0% (RT)
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CAS Number 7772-98-7
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Linear Formula Na2S2O3
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Molecular Weight 158.11
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EC Number 231-867-5
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MDL number MFCD00003499
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PubChem Substance ID 329763718
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NACRES NA.21
Description
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.[1]
Application
Sodium thiosulfate (Na2S2O3) may be used in the following studies:
• Industrial synthesis of methylene blue.[2]
• Quantitative estimation of elemental iodine by titrimetry.[3]
• Detection of trace levels of cysteine by employing triangular silver nanoplates (TAg-NPs).[4]
Properties
Related Categories | Chemical Synthesis, Essential Chemicals, Inorganic Salts, Research Essentials, Salts, |
Quality Level | 200 |
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 |