1,2-Benzenedicarboxylic acid, 4,4'-carbonylbis-, magnesium salt (1:2) 2479-49-4 4,4'-Carbonyldiphthalic acid, dimagnesium salt 68123-44-4 EINECS 268-561-6 Magnesium 4,4'-carbonylbisphthalate (2:1)