70210-30-9 Benzenesulfonic acid, 2,2'-(1,4-phenylenebis(carbonylimino(2-(acetylamino)-4,1-phenylene)azo))bis(5-((4-sulfophenyl)azo)-, tetrasodium salt Benzenesulfonic acid, 2,2'-(1,4-phenylenebis(carbonylimino-(2-(acetylamino)-4,1-phenylene)azo))bis(5-((4-sulfophenyl)azo)-, tetrasodium salt EINECS 274-426-2 Tetrasodium 2,2'-(1,4-phenylenebis(carbonylimino(2-acetamido-4,1-phenylene)azo))bis(5-((4-sulphonatophenyl)azo)benzenesulphonate)