4-Amino-2-[(2,4-diaminophenyl)azo]-5-[[3-[(2,4-diaminophenyl)azo]phenyl]azo]benzenesulfonic acid sodium salt

4-(4-Aminophenyl)benzenamine double nitriding, first with 2-Hydroxy-3-methylbenzoic acid coupling, and then and 4-Aminobenzenesulfonic acid diazo, and Benzene-1,3-diamine coupled to accidentally coupled nitrogen compounds.

brown. Soluble in water for orange brown. The strong sulfuric acid to red light purple, for orange after diluted. The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution for red light brown, and with orange brown will sink.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain