Definition of sodium thiosulfate
: a hygroscopic crystalline salt Na2S2O3 used especially as a photographic fixing agent and a reducing or bleaching agent —called also fixer, hypo
First Known Use of sodium thiosulfate
Medical Definition of sodium thiosulfate
: a hygroscopic crystalline salt Na2O3S2 that is used as a fixing agent in photography, as a reducing agent and bleaching agent, in chemical analysis for the titration of iodine, and in medicine as an antidote in poisoning especially by cyanides and as an antifungal agent—called also hypo, sodium hyposulfite
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