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/
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for hydroquinone
Historical Examples of hydroquinone
Hydroquinone as a developer was introduced this year by Eder and Toth, but it did not make much progress at first.
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.
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.
British Dictionary definitions for hydroquinone
a white crystalline soluble phenol used as a photographic developer; 1,4-dihydroxybenzene. Formula: C 6 H 4 (OH) 2Also 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
A white crystalline compound used as an antioxidant, a stabilizer, and a reagent.hydroquinol
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.