Used as a reducing agent and analytical reagent especially for iodometric titration.

Its primary purpose is acting as a reducing agent and complexing agent enabling dechlorination detoxification and selective dissolution in industrial and medical processes.

Sodium thiosulfate is an inorganic salt often found as a white translucent pentahydrate with molar mass around 248 gmol. It features a tetrahedral thiosulfate anion where a central sulfur bonds to three oxygens and one terminal sulfur showing high water solubility and a monoclinic crystal structure.