Acid Brown 75

Preparation

4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?diazo, 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.

Flammability and Explosibility

Non flammable

Properties and Applications

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