disodium 7-[(4-aminobenzoyl)amino]-4-hydroxy-3-[[3-methyl-4-[(3-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate

3-Aminobenzenesulfonic acid diazo, and a coupling m-Toluidine , its product to diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

red to blue light Claret. For bright red is soluble in water, soluble in ethanol for product red. The strong sulfuric acid in blue, diluted red for brown. The dye solution to join strong hydrochloric acid for red light brown; Add thick sodium hydroxide solution for purplish red color, have precipitation

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