C6H3CO23

Trimesitic Tri`me*sit"ic, a. [Pref. tri- + mesitylene + -ic.] (Chem.) Of, pertaining to, or designating, a tribasic acid, {C6H3.(CO2)3}, of the aromatic series, obtained, by the oxidation of mesitylene, as a white crystalline substance. [Written also {trimesic}.] [1913 Webster]