Found 2 items, similar to phthalic acid.
English → English (WordNet) Definition: phthalic acid phthalic acid n : a colorless acid used to make dyes and perfumes
English → English (gcide) Definition: Phthalic acid Phthalic \Phthal"ic\, a. [Naphthalene + -ic.] (Chem.) Pertaining to, or designating, a dibasic acid obtained by the oxidation of naphthalene and allied substances. [1913 Webster] Phthalic acid (Chem.), a white crystalline substance, C6H4.(CO2H)2, analogous to benzoic acid, and employed in the brilliant dyestuffs called the phthaleins. [1913 Webster]