sodium 5-[[3-(anilinosulphonyl)-4-methylphenyl]azo]naphthalene-2-sulphonate

Preparation

5-Amino-2-methyl-N-phenylbenzenesulfonamide?diazo, and 6-Hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications

orange. Soluble in water and ethanol for gold orange. The strong sulfuric acid in red for orange, orange after diluted into gold. The aqueous solution of dyes and strong hydrochloric acid have gold orange precipitation; Add thick sodium hydroxide solution for palm orange.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	4	3	4-5	3-4	2	3-4	3	4