a white, crystalline compound, C6H6O2, formed by the reduction of quinone: used chiefly in photography and to inhibit autoxidation reactions.
- Also called hy·dro·quin·ol [hahy-druh-kwin-awl, -ol], /ˌhaɪ drəˈkwɪn ɔl, -ɒl/, quinol.
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How to use hydroquinone in a sentence
By reaction with sodium sulphite it is converted into a hydroquinone sulphonate of deep purple colour.
hydroquinone was obtained by Caventou and Pelletier by heating quinic acid, but these chemists did not recognize its true nature.Coal | Raphael Meldola
When phenol is oxidized in acid solution by chlorine, tetrachlorquinone is obtained, a compound also obtainable from hydroquinone.
When hydrolyzed by mineral acids or emulsin, it yields glucose and hydroquinone.The Chemistry of Plant Life | Roscoe Wilfred Thatcher
hydroquinone as a developer was introduced this year by Eder and Toth, but it did not make much progress at first.The Evolution of Photography | John Werge
British Dictionary definitions for hydroquinone
a white crystalline soluble phenol used as a photographic developer; 1,4-dihydroxybenzene. Formula: C 6 H 4 (OH) 2: Also called: quinol
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012