Synonyms: 4,4'-Carbonyldiphthalic acid;3,3',4,4'-Benzophenonetetracarboxylic acid;Benzophenone-3,3',4,4'-tetracarboxylic acid;1,2-Benzenedicarboxylic acid, 4,4'-carbonylbis-;114367-57-6;2479-49-4;AC1L2P3J;AC1Q5TO6;AC1Q722D;Jsp004939;EINECS 219-613-1;AR-1F7806;4-(3,4-dicarboxybenzoyl)phthalic acid;68226-90-4 (tri-potassium salt);56585-48-9 (tetra-potassium salt);68123-44-4 (magnesium[2:1]salt);68226-91-5 (tri-hydrochloride salt);68123-48-8 (tetra-hydrochloride salt);50976-11-9;50986-44-2