2,7-Naphthalenedisulfonic acid, 4-amino-3-((4-((2,4-diaminophenyl)azo)phenyl)azo)-5-hydroxy-6-((4-sulfophenyl)azo)-, potassium sodium salt 4-Amino-3-((4-((2,4-diaminophenyl)azo)phenyl)azo)-5-hydroxy-6-((4-sulphophenyl)azo)naphthalene-2,7-disulphonic acid, potassium sodium salt 4-Amino-3-(4-(2,4-diaminophenylazo)phenylazo)-5-hydroxy-6-(4-sulfophenylazo)naphthalene-2,7-disulfonic acid, sodium, potassium salt 72906-31-1 EINECS 276-995-2