disodium 5-[[4-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]benzoyl]amino]salicylate

2-Hydroxy-5-(4-aminobenzamido)benzoic acid?diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

colourful red yellow light. Soluble in water for orange brown, and adequate soluble in ethanol for orange. The strong sulfuric acid for quality in red, orange for gold after diluted. The dye solution to join strong hydrochloric acid for orange brown, have precipitation; Add thick sodium hydroxide solution for red light orange brown.

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