Direct Blue 290

Direct Blue 29 Direct Blue 297 Direct Blue 291 Direct Blue 293 DIRECTBLUE296 Direct Blue 299 OXAMINE BLUE 4R Direct Blue 294 trisodium 5-amino-3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate