Acid Black 210

4-Amino-N-(4-aminophenyl)benzenesulfonamide double nitriding.sulfonylurea aniline in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?coupling, 4-Nitrobenzenamine diazo, and the above the products in alkaline conditions coupled, its product again with Benzene-1,3-diamine?coupling between.

black. Suitable for wool, silk, polyamide fiber dyeing and printing, also suitable for leather color.