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Alfa Aesar™ Sodium thiosulfate pentahydrate, 99+%

$30.34 - $93.31

Chemical Identifiers

Chemical Name or Material Sodium thiosulfate pentahydrate
CAS 10102-17-7
Molecular Formula Na2O3S2·5H2O
Linear Formula Na2S2O3·5H2O
Formula Weight 248.17g/mol (158.10g/mol Anhydrous)
MDL Number MFCD00149186
Merck Index 14,8694
View More Specs
Products
Catalog Number Mfr. No. Quantity Price Quantity    

AAA1791436

 
alfa aesar™
A17914-36
500g Each for $30.34

AAA179140E

 
alfa aesar™
A17914-0E
2500g Each for $93.31
Description & Specifications

Specifications

Melting Point 48°C
Boiling Point 100°C -5H2O
pH 6.5 to 8.0
Quantity 500g
Odor Odorless
Chemical Name or Material Sodium thiosulfate pentahydrate
CAS 10102-17-7
Assay ≥99%
Molecular Formula Na2O3S2·5H2O
Linear Formula Na2S2O3·5H2O
Formula Weight 248.17g/mol (158.10g/mol Anhydrous)
MDL Number MFCD00149186
Merck Index 14,8694
RTECS Number WE6660000
TSCA TSCA

Applications
Sodium thiosulfate pentahydrate is used as an analytical reagent in laboratories. It is used in photographic processing and in gold extraction. Its alkylated derivative S-alkylthiosulfonates are called Bunte salts. It is involved in the preparation of thioglycolic acid. Furthermore, it is used to dechlorinate tap water, for removing free bromine from solution and to check pH of bleach solutions with liquid indicators. Other used include tanning of leather, as an active component in hand warmers, in chemical heating pads and as an anionic surfactant to aid in dispersion of pharmaceutical preparations.

Solubility
Soluble in water. Insoluble in alcohol.

Notes
Incompatible with sodium nitrate, acids, strong oxidizing agents, iodides, silver salts, mercury salts and lead.