Benzenesulfonic acid, 4-amino-2-[(2,4-diaminophenyl)azo]-5-[[3-[(2,4-diaminophenyl)azo]phenyl]azo]-, monosodium salt

Preparation

N-(3-aminophenyl)formamide diazo, and 2,4-Diaminobenzenesulfonic acid coupling, hydrolysis amino acylation, product double nitriding, and Benzene-1,3-diamine (2 Moore) coupled.

Properties and Applications

red light brown. Soluble in water for orange brown, slightly soluble in alcohol. The strong sulfuric acid for ash to violet black, yellow to orange for diluted brown. The dye solution to join strong hydrochloric acid have dark brown precipitation; Add thick sodium hydroxide solution for orange brown; Add 10% sulfuric acid don’t change; Add 10% sodium hydroxide solution micro to become red.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	3	5	2	3-4		4
AATCC	5	5	1-2	2-3		5