6-[(2,4-Diamino-5-methylphenyl)azo]-3-[[4-[(2,4-diamino-5-methylphenyl)azo]-3,3-dimethoxy[1,1-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulfonic acid disodium salt
CAS No. 6897-36-5
6-[(2,4-Diamino-5-methylphenyl)azo]-3-[[4-[(2,4-diamino-5-methylphenyl)azo]-3,3-dimethoxy[1,1-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulfonic acid disodium salt;C.I.31940;Columbia Black B