sodium thiosulphate
n (Elements & Compounds) a white soluble substance used, in the pentahydrate form, in photography as a fixer to dissolve unchanged silver halides and also to remove excess chlorine from chlorinated water. Formula: Na2S2O3. Also called (not in technical usage): sodium hyposulphite or hypo
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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| Noun | 1. | sodium thiosulphate - a compound used as a fixing agent in photographic developingfixing agent, fixer - a chemical compound that sets or fixes something (as a dye or a photographic image) |
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