Acid Red 215

Preparation

2-Amino-5-nitrophenol?diazo, and 3-(3-Methyl-5-oxo-4,5-dihydropyrazol-1-yl)benzenesulfonamide coupling, and then in water solution and chromium acid were hot, make the generation of the 1:2 chromium complex.

Properties and Applications

blue-ray red. Purplish red color to purple powder. Used for wool, silk and polyamide fiber fabric dyeing, also can be used for polyamide, silk, viscose and wool fabric printing, also can be used for leather dyeing.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	6	4-5	4-5	5			5	5