naphthol
[ naf-thawl, -thol, nap- ]
/ ˈnæf θɔl, -θɒl, ˈnæp- /
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.
Also called
hydroxynaphthalene.
Words nearby naphthol
naphtha,
naphthacene,
naphthalene,
naphthalize,
naphthene,
naphthol,
naphthol yellow s,
naphthyl,
naphthyl group,
napier,
napier grass
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
Medical definitions for naphthol
naphthol
[ năf′thôl′, -thōl′, năp′- ]
n.
An organic compound occurring in two isomeric forms, alpha-naphthol and beta-naphthol.
naphthalenol
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.