6226-78-4

4-(Phenyldiazenyl)benzenamine diazo, coupled with 3-Hydroxynaphthalene-2,7-disulfonic acid.

Brilliant red. ?Soluble in water for red, soluble in soluble fiber element, not soluble in ethanol and organic solvents. The strong sulfuric acid for purple, after diluted purple precipitation; In nitric acid solution for blue, then turn amber color with black precipitation. In water solution to join 10% sodium hydroxide solution appear purple red light.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
AATCC	4	1-2		1	2		2-3