2-[(2,4-diaminophenyl)azo]-4,6-dinitrophenol

2-Amino-4,6-dinitrophenol diazotization, and Benzene-1,3-diamine coupling.

dark red light brown. Soluble in hot water for orange red, soluble in ethanol for red light brown. In concentrated sulfuric acid for brown, dilute almost unchanged; In concentrated nitric acid for brown solution, dilution after amber solution. Dye aqueous solution to join concentrated hydrochloric acid for amber solution; Join concentrated sodium hydroxide solution for brown.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	4	5	5	1	5	4	5