hydroquinone

[ hahy-droh-kwi-nohn, -druh-kwin-ohn ]

/ ˌhaɪ droʊ kwɪˈnoʊn, -drəˈkwɪn oʊn /

Save This Word!

noun Chemistry.

a white, crystalline compound, C6H6O2, formed by the reduction of quinone: used chiefly in photography and to inhibit autoxidation reactions.

QUIZ

CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?

Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

TAKE THE QUIZ TO FIND OUT

Also called hy·dro·quin·ol

[hahy-druh-kwin-awl, -ol], /ˌhaɪ drəˈkwɪn ɔl, -ɒl/, quinol.

Origin of hydroquinone

First recorded in 1860–65; hydro-¹ + quinone

Words nearby hydroquinone

hydroplaner, hydropneumatization, hydroponics, hydropower, hydrops, hydroquinone, hydrorhiza, hydros., hydroscope, hydroseed, hydrosere

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use hydroquinone in a sentence

By reaction with sodium sulphite it is converted into a hydroquinone sulphonate of deep purple colour.
Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5|Various
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.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1|Various
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

hydroquinone

hydroquinol (ˌhaɪdrəʊˈkwɪnɒl)

/ (ˌhaɪdrəʊkwɪˈnəʊn) /

noun

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