Benzoic acid, 5-[[4'-[[8-amino-7-[(2,5-disulfophenyl)azo]-1-hydroxy-5-sulfo-2-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, tetrasodium salt

3,3′-Dimethylbenzidine double nitriding, first??coupled with 2-Hydroxybenzoic acid, again in alkaline conditions and 2-Aminobenzene-1,4-disulfonic acid diazo, in acid conditions and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid and product of the three matches.

dark green. Soluble in water for variegated dark green, slightly soluble in alcohol for blue light green. The strong sulfuric acid for dark blue to violet black, dilute for green leaves after. The dye solution to join strong hydrochloric acid for olive green, precipitation; Add thick sodium hydroxide solution for dark blue light green.

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