sodium 6-[(2,4-diaminophenyl)azo]-3-[[4-[[4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulpho-2-naphthyl]azo]phenyl]amino]-3-sulphophenyl]azo]-4-hydroxynaphthalene-2,7-disulphonate

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