2-Naphthalenesulfonic acid, 5-[2-(4-chlorophenyl)diazenyl]-6-hydroxy-, sodium salt (1:1)

Preparation

4-Chlorobenzenamine diazo, and 6-Hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications

bright orange. Soluble in water and ethanol for red orange, easily soluble in soluble fiber element. In the strong sulfuric acid to orange for yellow orange after diluted. The dye solution to join 10% sulfuric acid as orange; Add 10% sodium hydroxide solution for orange brown. Used for wool, silk fiber dyeing, etc.