disodium 3-[[4-[(4-amino-7-sulphonatonaphthyl)azo]phenyl]azo]-6-[(2,4-diaminophenyl)azo]-4-hydroxynaphthalene-2-sulphonate

3-[[4-[(4-Amino-7-sulfonaphthalen-1-yl)azo]phenyl]azo]-6-[(2,4-diaminophenyl)azo]-4-hydroxy-2-naphthalenesulfonic acid disodium salt

2-Naphthalenesulfonic acid, 3-[[4-[(4-amino-7-sulfo-1- naphthalenyl)azo]phenyl]azo]-6-[(2,4-diaminophenyl )azo]-4-hydroxy-, disodium salt