sodium 7-[(chloroacetyl)amino]-4-hydroxy-3-(phenylazo)naphthalene-2-sulphonate

Preparation

aniline diazo, and 6-(2-Chloroacetamido)-1-naphthol-3-sulfonic acid?coupling.

Properties and Applications

bright orange. Soluble in water for red orange, soluble in ethanol, easily soluble in soluble fiber element. In the strong sulfuric acid to orange for yellow orange after diluted. Its water solution to join 10% of strong sulfuric acid as orange; Add 10% sodium hydroxide solution into orange brown. Used for wool, silk fiber dyeing, etc. Also used for paper, plastic and leather casein color, also used in organic pigments.