Mordant Orange 3

2-Amino-4-nitrophenol diazotization, and 4-(3-Methyl-5-oxo-4,5-dihydropyrazol-1-yl)benzenesulfonic acid coupling.

dark red light orange. Soluble in water for yellow orange. In concentrated sulfuric acid to yellow, to orange after diluted solution, have yellow precipitation; In concentrated sodium hydroxide solution for orange. Mainly used in color matching for top, wool, leather and nylon dyeing, has higher dyeing fastness.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	5	7	4		5	4-5	5