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[kat-i-kawl, -kol] /ˈkæt ɪˌkɔl, -ˌkɒl/
a colorless, crystalline, dihydroxyl derivative of benzene, C 6 H 6 O 2 , the ortho isomer, used chiefly in photography, for dyeing, and as a reagent; pyrocatechol.
Origin of catechol
First recorded in 1875-80; catech(u) + -ol1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for catechol
Historical Examples
  • Tanning materials are divided into two main classes: Pyrogallol, catechol.

    Leather K. J. Adcock
  • These skins are tanned with turwar bark, which contains a catechol tannin.

    Animal Proteins Hugh Garner Bennett
  • The other is called the catechol group and is strongly condemned.

    Library Bookbinding Arthur Low Bailey
  • catechol tans, often obtained from barks, contain usually about 60 per cent.

    Animal Proteins Hugh Garner Bennett
  • It is a catechol tan of peculiarly mellow quality and great practical value.

    Animal Proteins Hugh Garner Bennett
  • The tannins are classified into "pyrogallol tans" and "catechol tans," according to the parent phenol.

    Animal Proteins Hugh Garner Bennett
  • Of these the catechins are the most typical, and have been considered as the parent substances of the catechol tans.

    Animal Proteins Hugh Garner Bennett
  • Like all catechol tans, the resulting leather darkens on exposure to sunlight.

    Animal Proteins Hugh Garner Bennett
  • It is particularly advantageous to blend judiciously the two main types of material, the pyrogallol and catechol tans.

    Animal Proteins Hugh Garner Bennett
  • Xanthin and catechol browns are pleasing in appearance, but their effect is less rich than that obtained with potash.

    The Decoration of Leather Georges de Rcy
British Dictionary definitions for catechol


/ˈkætɪˌtʃɒl; -ˌkɒl/
a colourless crystalline phenol found in resins and lignins; 1,2-dihydroxybenzene. It is used as a photographic developer. Formula: C6H4(OH)2 Also called pyrocatechol
Word Origin
C20: from catechu + -ol1
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
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catechol in Medicine

catechol cat·e·chol (kāt'ĭ-kôl', -kōl')
See pyrocatechol.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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catechol in Science
  (kāt'ĭ-kôl', -kōl')   
A biologically important organic phenol occurring naturally in lignins and resins. It has two hydroxyl groups attached to a benzene ring. Catechol is very caustic and is used in dyeing and as a photographic developer and an antiseptic. Chemical formula: C6H6O2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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