Acid Black 16;C.I.Acid Black 16:C.I.20345;4-amino-6-[(4-nitrophenyl)hydrazinylidene]-5-oxo-3-[(4-sulfophenyl)diazenyl]naphthalene-1-sulfonic acid;(6Z)-4-amino-6-[(4-nitrophenyl)hydrazinylidene]-5-oxo-3-(4-sulfophenyl)diazenyl-naphthalene-1-sulfonic acid
4-Aminobenzenesulfonic acid diazo in inorganic acid medium, and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid coupling, and then 4-Nitrobenzenamine diazo again, and the generation of single accidentally coupled nitrogen compounds.
Properties and Applications
black. Soluble in water, slightly soluble in ethanol, very few soluble in acetone, insoluble in benzene. In the dark for the strong sulfuric acid, diluted for purple. Suitable for leather color.
