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sodium thiosulfate

noun

, Chemistry.
  1. a white, crystalline, water-soluble powder, Na 2 S 2 O 3 ⋅5H 2 O, used as a bleach and in photography as a fixing agent.


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Word History and Origins

Origin of sodium thiosulfate1

First recorded in 1880–85

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sodium thiocyanatesodium thiosulphate