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

Chemical Properties

Yellowish red powder. Easily soluble in water, solubility in water (90℃) is 80g/L, aqueous solution is big red, add concentrated hydrochloric acid to red, there is precipitation; add concentrated sodium hydroxide to orange. Soluble in ethanol is red, slightly soluble in acetone. Cherry red in concentrated sulfuric acid, red after dilution. Green lotus color in concentrated sulfuric acid, magenta precipitate after dilution. Darkens when stained with copper and iron ions.

Uses

Sodium 3-[[4-(benzoylethylamino)-2-methylphenyl]azo]-4-hydroxynaphthalene-1-sulphonate is suitable for dyeing wool, silk, and their blended fabrics, and can also be used for direct printing on wool and silk fabrics. It has good leveling properties. When used for dyeing blended fabrics, wool is dyed, silk is slightly stained, and cellulose and acetate fibers are not stained.

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.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	4	3	3	2-3	3		3