[bey-tuh-naf-thawl, -thol, -nap- or, esp. British, bee-]
Origin of beta-naphthol
[naf-thawl, -thol, nap-]
- 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.
Origin of naphthol
Also called hydroxynaphthalene.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for beta-naphthol
Glauber's salt, then diazotised and develop with beta-naphthol.
Glauber's salt, then diazotise and develop with beta-naphthol.
Sponges should be kept in a beta-naphthol or a corrosive sublimate solution during the operation.
The antiseptic sutures and ligatures should be similarly soaked in beta-naphthol solution during the progress of the operation.
Their discovery not only increased the consumption of beta-naphthol, but also that of the bases which were used for diazotising.Coal
- 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
C19: from naphtha + -ol 1
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
naphthol(năf′thôl′, -thōl′, năp′-)
- 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.
[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.
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