6-Amino-5-[[4'-[(2-amino-7-sulfo-1-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-2-naphthalenesulfonic acid disodium salt

Preparation

3,3′-Dimethylbenzidine double nitriding, respectively with the 6-Aminonaphthalene-2-sulfonic acid and 7-Aminonaphthalene-2-sulfonic acid coupling.

Properties and Applications

blue-ray red. Moderate soluble in water for palm light orange,slightly soluble in ethanol as a pale orange red, insoluble in other organic solvents. The strong sulfuric acid in blue, diluted for brown. The dye solution into the join strong hydrochloric acid for brown, have precipitation; Add thick sodium hydroxide solution for palm light orange, precipitation..

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