Disperse Orange 31

4-Nitrobenzenamine diazo, and 2-((2-Cyanoethyl)(phenyl)amino)ethyl acetate?coupling

The synthetic azo dye Disperse Orange 31 was wrongly substituted by Disperse Orange 3 in patch test materials from Chemotechnique. This situation explains why a relatively low percentage of patients positive to PPD were positive to Disperse Orange 3, although a coreaction is explained to be very frequent because of skin transformation of Disperse Orange 3 into PPD.

Red orange, Yellow red. Dry red powder, insoluble in water. Apply to polyester and their blended fabric dyeing and printing. In the red orange polyester for, in the red for yellow nylon, in the vinegar on fiber for red orange.

Standard	Ironing Fastness		Light Fastness	Persperation Fastness		Washing Fastness
	Fading	Stain		Fading	Stain	Fading	Stain
ISO	4-5	2-3	5-6	5	5	4-5	5