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

Preparation

2′,3-Dimethyl-4-amino-4′-sulfoazobenzene diazo, and 7-(3-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications

Claret. Soluble in water for red light purple to purplish red color, soluble in ethanol for red, slightly soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for blue-ray green, for yellow orange after diluted, blue light green solution, brown to yellow. The dye solution to join strong hydrochloric acid for red zero red; Add thick sodium hydroxide solution for purple solution, accompanied by precipitation.

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