Other Name: Acid Black BNG,Acid Black NT,Weak Acid Black 3G,Weak Acid Black NT
Molecular Formula: C₃₄H₂₅K₂N₁₁O₁₁S₃
Molecular Weight: 938.02
Manufacturing Methods : 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.
Properties and Applications: black. Suitable for wool, silk, polyamide fiber dyeing and printing, also suitable for leather color.