Preparation
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.