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naphthol - 7 dictionary results
naph⋅thol
[naf-thawl, -thol, nap-] 
θɔl
–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. |
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To naphthol
| 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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Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Naphthol
Naph"thol\, n. [Naphthalene + -ol.] (Chem.) Any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol. In general they are crystalline substances with a phenol (carbolic) odor. Naphthol blue, Naphthol orange, Naphthol yellow (Chem.), brilliant dyestuffs produced from certain complex nitrogenous derivatives of naphthol or naphthoquinone.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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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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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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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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| naphthol (nāf'thôl', -thōl', nāp'-) Pronunciation Key
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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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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