Sodium thiosulfate, anhydrous, 98+%, Thermo Scientific Chemicals

Description

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.

Specifications

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

• 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

SDS

RUO – Research Use Only