Benzoic acid, 5-[[4-[[4-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]benzoyl]amino]phenyl]azo]-2-hydroxy-, disodium salt

4-Nitrobenzenamine diazo, first with 2-Hydroxybenzoic acid coupling, and then will The nitro reduction, and nitrobenzene formex condensation of chlorine, then The nitro reduction nitride pay equal attention to, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

colourful red yellow light. Soluble in water is palm red light to orange, soluble in alcohol. The strong sulfuric acid for blue-ray in red, orange brown for colourful after diluted. Dye with strong hydrochloric acid solution for purplish red color, have precipitation; With strong sodium hydroxide solution for palm light orange, the red light.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	3	3	3	4		4
AATCC	3	1-2	3	2-3		4