7-(Benzoylamino)-4-hydroxy-3-[[2-methoxy-5-methyl-4-[(4-sulfophenyl)azo]phenyl]azo]-2-naphthalenesulfonic acid disodium salt

4-Aminobenzenesulfonic acid diazo, and 2-Amino-4-methylanisole coupling, its product to diazo, and 7-Benzamido-4-hydroxynaphthalene-2-sulfonic acid coupling.

red light purple. Soluble in water for red Violet. The strong sulfuric acid for blu-ray green, blue purple after diluted precipitation. The dye solution to join strong hydrochloric acid blue precipitation; Sodium hydroxide solution to blue precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	2-3	4	5	2-3		3