Acid Brown 75

4-Amino-5-hydroxynaphthalene-2,7-disulfonic aciddiazo, in weak alkali conditions Coupled with resorcinol, 2-Amino-4,6-dinitrophenol diazo, in weak alkali conditions and the single accidentally nitrogen content coupling, its product again with diazo of 4-Nitrobenzenamine weak inorganic acid in the coupling.

Non flammable

dark red light brown. Apply to wool, polyamide fiber dyeing, also can be used for leather color.