disodium 4-amino-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate

4-Amino-3-[p-(2,4-diaminophenylazo)phenylazo]-5-hydroxy-6-phenylazo-2,7-naphthalenedisulfonic acid disodium salt

2,7-Naphthalenedisulfonic acid, 4-amino-3-[[4-[(2,4-diaminophenyl) azo]phenyl]azo]-5-hydroxy-6-(phenylazo)- , disodium salt