1,2,4,5-Benzenetetracarboxylic acid, polymer with 1,3-benzenedicarboxylic acid, 2,2'-oxybis(ethanol) and 5-sulfo-1,3-benzenedicarboxylic acid monosodium salt 68134-41-8 Isophthalic acid, pyromellitic acid, 5-sulfoisophthalic acid sodiumsalt, diethylene glycol polymer