sodium 3-[[4-(benzoylethylamino)-2-methylphenyl]azo]-4-hydroxynaphthalene-1-sulphonate

Preparation

3′-Methyl-4′-amino-N-ethylbenzanilide diazo, coupled with the 4-Hydroxynaphthalene-1-sulfonic acid.

Properties and Applications

red light yellow. Yellow light red powder. Soluble in water for big red, on 90 ° C water solubility of 80 g/L, soluble in ethanol in red. Dye of sulfuric acid in a cherry red, diluted into red. Its water solution and strong hydrochloric acid into red, precipitation; Add thick sodium hydroxide solution to orange. Discharge of copper, iron ion in color shade darker. This applies to goods wool, silk and their blended fabric dyeing, and can be directly on the wool and silk printing.