6262-08-4

2-(2-Methylanilino)-5-aminobenzenesulfonic acid?diazo, and Naphthalen-1-amine, its products coupled diazo again, and 6-Hydroxynaphthalene-2-sulfonic acid coupling

navy blue light to dark. Soluble in water for red light purple, not soluble in ethanol and acetone. The strong sulfuric acid for black purple, diluted into a dark blue blue, and the emergence of black precipitation. In water solution to join 10% sodium hydroxide solution for dark purple