Benzoic acid, 5-[[4'-[[2,4-dihydroxy-3-[(4-sulfo-1-naphthalenyl)azo]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt

4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then coupled with Resorcinol?, 4-Hydroxynaphthalene-1-sulfonic acid diazo, and the generation of single azo product matches.

brown. Soluble in water for yellow brown, and adequate soluble in alcohol. The strong sulfuric acid for purple, diluted is shallow brown. The dye solution to join strong hydrochloric acid have yellow brown precipitation; Add thick sodium hydroxide solution for orange red to big red.

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