2,7-Naphthalenedisulfonic acid, 4-amino-3-((4-aminophenyl)azo)-5-hydroxy-6-(phenylazo)-, disodium salt 2,7-Naphthalenedisulfonic acid, 4-amino-3-((p-aminophenyl)azo)-5-hydroxy-6-(phenylazo)-, disodium salt 5850-39-5 84842-82-0 Disodium 4-amino-3-((4-aminophenyl)azo)-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate EINECS 227-452-3