4-(4-Aminophenyl)benzenamine double nitriding, in acid conditions coupled with 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid, 2-Aminobenzenesulfonic acid diazo, in alkaline conditions and the above the products of coupling, and then in alkaline conditions and 3-(O-toluidino)phenol?coupling.
Properties and Applications
blue and black. Blu-ray black powder, soluble in water. The strong sulfuric acid for dark purple. This product used for wool, silk dyeing and printing, also can be used for leather color.
![trisodium 4-amino-5-hydroxy-3-[[4'-[[4-hydroxy-2-[(o-tolyl)amino]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-6-[(4-sulphonatophenyl)azo]naphthalene-2,7-disulphonate Structure](/CAS/GIF/6358-80-1.gif)