Reactive Red 11

Preparation

4-Aminobenzoic acid diazo, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, again with 2,4,6-Trichloro-1,3,5-triazine condensation.

Properties and Applications

colourful red blue light. Purplish red powder. The strong sulfuric acid for purple, diluted into blue light red, precipitation; In nitric acid for red, diluted is still red, precipitation. Blue water solution is red, with 1 Moore sodium hydroxide solution turned red, continue to add insurance powder and warm, become light yellow, plus a boric acid sodium is still light yellow. Mainly used for cotton, viscose fabric and silk dyeing and printing.

Standard	Light Fastness	Oxygen bleaching		Persperation Fastness		Soaping
		Fading	Stain	Fading	Stain	Fading	Stain
ISO	4	4-5	4	4-5	2	4-5(5*100℃)	3-4