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naphthol

 - 5 dictionary results

naph⋅thol

  [naf-thawl, -thol, nap-]
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–noun Chemistry.
either of two isomeric hydroxyl derivatives, C1 0H7OH, of naphthalene (alpha-naphthol or 1-naphthol and beta-naphthol or 2-naphthol), white or yellowish crystals, with a phenolic odor, that darken on exposure to light: used chiefly in dyes, drugs, perfumes, and insecticides.
Also called hydroxynaphthalene.

Origin:
1840–50; naphth- + -ol 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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naph·thol   (nāf'thôl', -thōl', -thŏl', nāp'-)   
n.  An organic compound, C10H7OH, occurring in two isomeric forms, alpha-naphthol and beta-naphthol.

[naphth(alene) + -ol2.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: naph·thol
Pronunciation: 'naf-"thol, 'nap-, -"thOl
Function: noun
: either of two isomeric derivatives C10H8O ofnaphthalene found in coal tar or made synthetically: a : one used chiefly in synthesizing dyes called also alpha-naphthol b : one used chiefly as anintermediate (as for dyes and pharmaceuticals) and especially formerly in medicine as an antiseptic and parasiticide called also beta-naphthol
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

naphthol naph·thol (nāf'thôl', -thōl', nāp'-) or naph·tol (-tôl, -tōl)
n.
An organic compound occurring in two isomeric forms, alpha-naphthol and beta-naphthol. Also called naphthalenol.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia

naphthol

either of two colourless, crystalline organic compounds derived from naphthalene and belonging to the phenol family; each has the molecular formula C10H7OH. Both compounds have long been identified with the manufacture of dyes and dye intermediates; they also have important uses in other areas of the chemical industry.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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