59537-45-0 6739-62-4 Benzoic acid, 2-((2-amino-6-((4'-((3-carboxy-4-hydroxyphenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-7-sulfo-1-naphthalenyl)azo)-5-nitro-, trisodium salt C.I. 30400 C.I. Direct Black 91 EINECS 229-801-5 Trisodium 2-((2-amino-6-((4'-((3-carboxylato-4-hydroxyphenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-7-sulphonato-1-naphthyl)azo)-5-nitrobenzoate