Reactive Violet 8

Preparation

p-Anisidine diazo, and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?coupling, and 2,4,6-Trichloro-1,3,5-triazine condensation, and then salting-out.

Properties and Applications

red light purple. Grey purple powder. The strong sulfuric acid for blue-black, accompanied by a few purple precipitation, diluted for blu-ray red; In concentrated nitric acid for brown, Diluted into reddish brown. Water solution is violet. Add in 1 Moore sodium hydroxide solution into orange, continue to join insurance powder and warm, fade, add a boric acid sodium into light yellow. Mainly used for cotton, nylon, silk, viscose fiber and fabric dyed and roll across, solid color rate is higher.

Standard	Light Fastness	Oxygen bleaching		Persperation Fastness		Soaping
		Fading	Stain	Fading	Stain	Fading	Stain
ISO	4			5	4-5	4-5(95℃)	5