sodium thiosulfate

noun

: a hygroscopic crystalline salt Na2S2O3 used especially as a photographic fixing agent and a reducing or bleaching agent

called also fixer, hypo

Word History

First Known Use

1885, in the meaning defined above

Time Traveler
The first known use of sodium thiosulfate was in 1885

Dictionary Entries Near sodium thiosulfate

Cite this Entry

“Sodium thiosulfate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sodium%20thiosulfate. Accessed 6 Jun. 2023.

Kids Definition

sodium thiosulfate

noun
sodium thio·​sul·​fate
-ˌthī-ə-ˈsəl-ˌfāt
: a chemical compound used especially in photography to make images permanent and in bleaching

Medical Definition

sodium thiosulfate

noun
: 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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