Phthal"ic (?), a. [Naphthalene + -ic.] Chem.

Pertaining to, or designating, a dibasic acid obtained by the oxidation of naphthalene and allied substances.

Phthalic acid Chem., a white crystalline substance, C6H4.(CO2H)2, analogous to benzoic acid, and employed in the brilliant dyestuffs called the phthaleins.


© Webster 1913.

Log in or register to write something here or to contact authors.