naphthol
[ naf-thawl, -thol, nap- ]
/ ˈnæf θɔl, -θɒl, ˈnæp- /
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noun Chemistry.
either of two isomeric hydroxyl derivatives, C10H7OH, 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.
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Also called hydroxynaphthalene.
Words nearby naphthol
naphtha, naphthacene, naphthalene, naphthalize, naphthene, naphthol, naphthol yellow S, naphthyl, naphthyl group, napier, napier grass
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Example sentences from the Web for naphthol
British Dictionary definitions for naphthol
naphthol
/ (ˈnæfθɒl, ˈnæp-) /
noun
a white crystalline solid having two isomeric forms, alpha-naphthol, used in dyes, and beta-naphthol, used in dyes and as an antioxidant. Formula: C 10 H 7 OH
Word Origin for naphthol
C19: from naphtha + -ol 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Medical definitions for naphthol
naphthol
[ năf′thôl′, -thōl′, năp′- ]
n.
An organic compound occurring in two isomeric forms, alpha-naphthol and beta-naphthol.naphthalenol
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for naphthol
naphthol
[ năf′thôl′, -thōl′, năp′- ]
A poisonous organic compound occurring in two isomeric forms. Both isomers are important in the manufacture of dyes, and also in making antiseptics, insecticides, and tanning agents. Naphthol consists of a hydroxyl group (OH) attached to naphthalene. Chemical formula: C10H8O.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.