Phthalic

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

Phthal'ic adjective [ Na phthal ene + -ic .] (Chemistry) Pertaining to, or designating, a dibasic acid obtained by the oxidation of naphthalene and allied substances. Phthalic acid (Chemistry) , a white crystalline substance, C 6 H 4 .(CO
Found on http://www.encyclo.co.uk/webster/P/79
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