3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt

Preparation

3-Aminonaphthalene-1,5-disulfonic acid diazo, and 2,6-Dimethylbenzenamine coupling, its product to diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications

red. Soluble in water for red jade, soluble in ethanol for product red. In the strong sulfuric acid as dark blue, diluted in red. The dye solution with strong hydrochloric acid have purplish red precipitate; Add thick sodium hydroxide solution for purplish red color to red sauce.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	3	4	3	3-4		4