1,2-Benzenedicarboxylic acid, 4,4'-carbonylbis-, trisodium salt 2479-49-4 4,4'-Carbonylbis(1,2-benzenedicarboxylic acid), trisodium salt 68226-91-5 EINECS 269-329-7 Trisodium hydrogen 4,4'-carbonylbisphthalate