[meth-uh l-naf-thuh-leen, -nap-] /ˌmɛθ əlˈnæf θəˌlin, -ˈnæp-/
a compound, C 1 1 H 1 0 , whose alpha isomer, a colorless liquid, is used in determining cetane numbers.
either of two isomeric derivatives of naphthalene: a liquid (1-methylnaphthalene), used in standardizing diesel fuels, or a solid (2-methylnaphthalene), an insecticide
methylol meth·yl·ol (měth’ə-lôl) n. The monovalent radical, CH2OH, present in primary alcohols. Also called hydroxymethyl.
noun, Chemistry. 1. an oily, clear to amber, water-insoluble liquid, C 1 9 H 3 6 O 2 , used chiefly as an intermediate for detergents, wetting agents, and emulsifiers.
noun, Chemistry. 1. an orange-yellow, slightly water-soluble powder, C 1 4 H 1 4 N 3 NaO 3 S, used chiefly as an acid-base indicator.
[meth-uh l-par-uh-ben] /ˌmɛθ əlˈpær əˌbɛn/ noun, Chemistry. 1. a fine, white, needlelike substance, C 8 H 8 O 3 , used chiefly as a preservative in foods and pharmaceuticals.