[naf-thawl, -thol, nap-] /ˈnæf θɔl, -θɒl, ˈnæp-/
either of two isomeric hydroxyl derivatives, C 1 0 H 7 OH, 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.
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
naphthol naph·thol (nāf’thôl’, -thōl’, nāp’-) or naph·tol (-tôl, -tōl)
An organic compound occurring in two isomeric forms, alpha-naphthol and beta-naphthol. Also called naphthalenol.
(nāf’thôl’, -thōl’, nāp’-)
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.
- Naphthol yellow s
naphthol yellow S n. An acid dye used as a stain for basic proteins in microspectrophotometry.
[naf-thil, nap-] /ˈnæf θɪl, ˈnæp-/ adjective, Chemistry. 1. containing the . /ˈnæfθaɪl; -θɪl; ˈnæp-/ noun 1. (modifier) of, consisting of, or containing either of two forms of the monovalent group C10H7–
noun, Chemistry. 1. Also called alpha-naphthyl group, alpha-naphthyl radical. the univalent group C 1 0 H 7 –, having a replaceable hydrogen atom in the first, or alpha, position; 1-naphthyl group. 2. Also called beta-naphthyl group, beta-naphthyl radical. the univalent group C 1 0 H 7 –, having a replaceable hydrogen atom in the second, […]
a Hamitic tribe descended from Mizraim (Gen. 10:13). Others identify this word with Napata, the name of the city and territory on the southern frontier of Mizraim, the modern Meroe, at the great bend of the Nile at Soudan. This city was the royal residence, it is said, of Queen Candace (Acts 8:27). Here there […]