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 (năf′thôl′, -thōl′, -thŏl′, năp′-) also naph·tol (-tôl, -tōl, -tŏl)
A hydroxy derivative of naphthalene, C10H8O, occurring in two isomeric forms: alpha-naphthol, used in making dyes and perfumes, and beta-naphthol, used in making antioxidants, pigments, dyes, and pharmaceuticals.


(ˈnæfθɒl; ˈnæp-)
(Chemistry) a white crystalline solid having two isomeric forms, alpha-naphthol, used in dyes, and beta-naphthol, used in dyes and as an antioxidant. Formula: C10H7OH
[C19: from naphtha + -ol1]


(ˈnæf θɔl, -θɒl, ˈnæp-)

either of two isomeric hydroxyl derivatives, C10H7OH, of naphthalene: used chiefly in dyes, drugs, perfumes, and insecticides.
[1840–50; napth(a) + -ol1]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.naphthol - either of two phenols derived from naphthalene
alpha-naphthol - an isomer of naphthol used in dyes
beta-naphthol - an isomer of naphthol used in rubber as an antioxidant
phenol - any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups
References in periodicals archive ?
Retention times (RT) for the control red dye 40, standard 1-naphtol and samples at different wavelengths Sample 285 nm 315 nm RT (min) RT (min) Control (red 40) 2.643 2.704 5.545 5.545 5.6671 5.676 2.038 Standard 1-naphtol 5.585 5.591 5.816 Escherichia coli DH5 [+ or -] 5.599 5.595 Escherichia coli E2348/69 5.573 5.551 Citrobacter DBS 13 5.591 5.591 Enterobacter sp * 5.559 5.553 Escherichia coli * 5.553 5.548 Enterobacter cloacae 5.522 5.595 12.28 * Note: Strains from the intestinal microbial Table 2.
Experiments were performed with phenol, cresols, 2,4,6-trichlorophenol, o- and p-benzylphenols, and 1-naphtol in the temperature range 30-80[degrees]C and the pH range 9.5-13.