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  7. Sodium thiosulfate, anhydrous, 98+%

Sodium thiosulfate, anhydrous, 98+%

Catalog No. p-7023758
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AAA1762936 500 g
AAA176290E 2500 g
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Catalog No. AAA1762936 Supplier Thermo Scientific Chemicals Supplier No. A1762936
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Description

CAS: 7772-98-7 | Na2O3S2 | 158.10 g/mol

Sodium thiosulfate is used in volumetric analysis to estimate the concentration of certain compounds in solution (hydrogen peroxide) as well as chlorine content in bleaching powder and water. It is used to prepare S-alkylthiosulfonates. Furthermore, it is used in the tanning of leather and in photographic processing. It is used as an antidote to cyanide poisoning and acts as a safe disposal medium in chemistry laboratories when working with bromine, iodine and other strong oxidizers. It is an important component in hand warmers and heating pads.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
Sodium thiosulfate is used in volumetric analysis to estimate the concentration of certain compounds in solution (hydrogen peroxide) as well as chlorine content in bleaching powder and water. It is used to prepare S-alkylthiosulfonates. Furthermore, it is used in the tanning of leather and in photographic processing. It is used as an antidote to cyanide poisoning and acts as a safe disposal medium in chemistry laboratories when working with bromine, iodine and other strong oxidizers. It is an important component in hand warmers and heating pads.

Solubility
Soluble in water. Insoluble in alcohol.

Notes
Hygroscopic. Incompatible with strong acids, strong oxidizing agents, iodine and mercury.

Chemical Identifiers

CAS 7772-98-7
Molecular Formula Na2O3S2
Molecular Weight (g/mol) 158.10
MDL Number MFCD00003499
InChI Key AKHNMLFCWUSKQB-UHFFFAOYSA-L
Synonym sodium thiosulfate, sodium thiosulphate, disodium thiosulfate, sodium thiosulfate anhydrous, hypo, sodiumthiosulfate, chlorine cure, chlorine control, declor-it, thiosulfuric acid, disodium salt
PubChem CID 24477
IUPAC Name disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane
SMILES [Na+].[Na+].[O-]S([S-])(=O)=O

Specifications

Quantity 500 g
Linear Formula Na2S2O3
Merck Index 14,8694
Solubility Information Soluble in water. Insoluble in alcohol.
Formula Weight 158.1
Percent Purity 99%
Odor Odorless
Sensitivity Hygroscopic
Density 1.667
Chemical Name or Material Sodium thiosulfate, anhydrous

Safety and Handling

EINECSNumber 231-867-5
RTECSNumber XN6476000
TSCA Yes
Recommended Storage Ambient temperatures

RUO – Research Use Only