sodium 3-[[1-(3-chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-2-hydroxy-5-nitrobenzenesulphonate

3-Amino-2-hydroxy-5-nitrobenzenesulfonic acid diazotization, and 1-(3-Chlorophenyl)-3-methyl-1H-pyrazol-5(4H)-one?coupling.

dark red light orange. Soluble in water and Etanol for orange. In concentrated sulfuric acid to yellow, after diluted solution for yellow, accompanied by precipitation. Dye aqueous solution to join 10% sulfuric acid as yellow; Add 10% sodium hydroxide solution for orange.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	4-5	6-7	4-5	4	4-5	5	5
AATCC	4-5	6-7	4		4-5	5