5-[[4'-[[8-[[2,4-Diamino-5-[(4-sodiosulfophenyl)azo]phenyl]azo]-1-hydroxy-3,6-bis(sodiosulfo)-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxybenzoic acid sodium salt

4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions in turn and 2-Hydroxybenzoic acid??and where did 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?coupling, product diazo again, and 4-Aminobenzenesulfonic acid diazo, and Benzene-1,3-diamine coupled to accidentally coupled nitrogen compounds.

dark brown.

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