6252-62-6 Benzenesulfonic acid, 4,4'-(1,3-phenylenebis(azo(4,6-diamino-3,1-phenylene)azo))bis-, disodium salt Disodium 4,4'-(1,3-phenylenebis(azo(4,6-diamino-3,1-phenylene)azo))bis(benzenesulphonate) EINECS 228-375-8