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
Molecular Formula:
Molecular Weight: 0

Synonyms

C.I.31940

Columbia Black B

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