2,7-Naphthalenedisulfonic acid, 4-amino-3-4-4-(2,4-diaminophenyl)azophenylsulfonylphenylazo-5-hydroxy-6-(phenylazo)-, disodium salt

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

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