Synonyms: Aceticacid,[[5-amino-2-[[4'-[(1-hydroxy-4-sulfo-2-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]phenyl]amino]oxo-,disodium salt (9CI); Oxanilic acid,5'-amino-2'-[[4'-[(1-hydroxy-4-sulfo-2-naphthyl)azo]-3,3'-dimethoxy-4-biphenylyl]azo]-,disodium salt (8CI); C.I. 24050; Oxamine Black BR