Chemistry. any of three isomeric acids having the formula C 8 H 6 O 4 , especially the ortho isomer (orthophthalic acid) a colorless, crystalline, slightly water-soluble solid used chiefly in the manufacture of dyes, medicine, and perfume.
a soluble colourless crystalline acid used in the synthesis of dyes and perfumes; 1,2-benzenedicarboxylic acid. Formula: C6H4(COOH)2
phthalic acid n.
A colorless crystalline organic acid prepared from naphthalene and used in the synthesis of dyes and other organic compounds.
A colorless, crystalline organic acid prepared from naphthalene and used in the synthesis of dyes, perfumes, and other organic compounds. Chemical formula: C8H6O4.
noun, Chemistry. 1. a white, crystalline, slightly water-soluble solid, C 8 H 4 O 3 , used chiefly in the manufacture of dyes, alkyd resins, and plasticizers. noun 1. a white crystalline substance used mainly in producing dyestuffs. Formula: C6H4(CO)2O phthalic anhydride n. A white crystalline compound prepared by oxidizing naphthalene and used in the […]
[thal-in, fthal-] /ˈθæl ɪn, ˈfθæl-/ noun, Chemistry. 1. any of a group of compounds obtained by the reduction of the phthaleins.
noun 1. a pigment used in painting, derived from copper phthalocyanine and characterized chiefly by its brilliant, dark-blue color and by permanence.
[thal-uh-sahy-uh-neen, -nin, fthal-] /ˌθæl əˈsaɪ əˌnin, -nɪn, ˌfθæl-/ noun, Chemistry. 1. Also called metal-free phthalocyanine. a blue-green pigment, C 3 2 H 1 8 N 8 , derived from phthalic anhydride. 2. any of the group of blue or green pigments produced by the interaction of and a metal, especially copper: used chiefly in the […]