6391-23-7

N-(4-aminophenyl)-4-nitrobenzamide diazo, and 5-Oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid coupling, its product nitro reduction for amino, again diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

red. Soluble in water for red orange brown, slightly soluble in ethanol is palm light orange. The strong sulfuric acid in bright red, diluted for orange, red orange precipitation. The dye solution with strong hydrochloric acid for red, have precipitation; Add thick sodium hydroxide solution for orange brown, have precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	3	3-4	3	4		4
AATCC	3	4	3	3		4