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 |
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MilliporeSigmaSodium thiosulfate purum p.a., anhydrous, (RT) (250g)
SKU: 72049-250G
$79.4072049 Sigma-Aldrich Sodium thiosulfate purum p.a., anhydrous, ≥98.0% (RT) CAS Number 7772-98-7 Linear Formula Na2S2O3 Molecular Weight -
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SKU: 71635-1KG
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MilliporeSigmaSodium thiosulfate ReagentPlus, (1Kg)
SKU: 217263-1KG
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MilliporeSigmaSodium citrate dibasic sesquihydrate purum p.a., (T) (250g)
SKU: 71635-250G
$44.3071635 SIGMA-ALDRICH Sodium citrate dibasic sesquihydrate purum p.a., ≥99.0% (T) Synonym: Citric acid disodium salt, Disodium hydrogen citrate sesquihydrate CAS Number 6132-05-4 Linear... -
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SKU: 75688-50G
$59.60Oxalic acid, puriss. p.a., anhydrous, ≥99.0% (RT), 50G Linear Formula: HO2CCO2H CAS Number: 144-62-7 Molecular Weight: 90.03 Beilstein: 385686 EC Number: 205-634-3 -
MilliporeSigmaCopper turnings, purum p.a., (250g)
SKU: 61139-250G
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MilliporeSigmaSodium sulfate ACS reagent, anhydrous, granular, 1Kg
SKU: 239313-1KG
$120.00239313 Sigma-Aldrich Sodium sulfate ACS reagent, ≥99.0%, anhydrous, granular CAS Number 7757-82-6 Linear Formula Na2SO4 Molecular Weight 142
