2-Naphthalenesulfonic acid, 6-[(2,4-diaminophenyl)azo]-3-[[3-[(2,4-diaminophenyl)azo]phenyl]azo]-4-hydroxy-, monosodium salt

N-(3-aminophenyl)formamide diazo, first in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, hydrolysis amino acylation, product to double nitriding, and Benzene-1,3-diamine (2 Moore) coupled.

Dark red light brown. Soluble in water, soluble in ethanol right amount for red light brown. The strong sulfuric acid is palm in light red to red sauce, diluted for brown. The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution for red light brown.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
AATCC	3-4	5	3	3		3