Sodium Thiosulfate Pentahydrate
Sodium Thiosulfate Pentahydrate (CAS: 10102-17-7), historically called hypo, is a colorless crystalline salt with remarkable versatility as a reducing agent, complexant, and dechlorinating agent. Its most recognized application is photographic processing, where it dissolves unexposed silver halide from film and paper emulsions during fixing. Water treatment facilities employ it to neutralize residual chlorine and chloramine in aquaculture, aquariums, and municipal systems, protecting aquatic life and improving water quality. Medical applications include intravenous treatment for cyanide poisoning and topical management of calciphylaxis, functioning as a sulfur donor and chelating agent. The compound also serves as a titrant in iodometric analysis, a dechlorinating agent in textile processing, and in gold extraction processes. With its excellent water solubility, low toxicity, and predictable redox behavior, sodium thiosulfate pentahydrate is an essential reagent across imaging, medical, analytical, and industrial fields.
– Photographic Fixing: Used in film and paper processing dissolving unexposed silver halides to produce stable, permanent images.
– Water Dechlorination: Serves in aquaculture, aquariums, and water treatment neutralizing chlorine and chloramine toxicity in sensitive aquatic systems.
– Medical Applications: Employed intravenously as an antidote for cyanide poisoning and topically for treating calciphylaxis in dialysis patients.
– Analytical Chemistry: Applied as the standard titrant in iodometric determinations and as a reducing agent in various assay procedures.
Product Name: Sodium Thiosulfate Pentahydrate
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