1,3,6-Naphthalenetrisulfonic acid, 8-hydroxy-7-[[4'-[(2-hydroxy-1-naphthalenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-, trisodium salt

3,3′-Dimethylbenzidine double nitriding, respectively with the 8-Hydroxynaphthalene-1,3,6-trisulfonic acid and Naphthalen-2-ol coupling.

red light blue. Soluble in water for blue, slightly soluble in alcohol. The strong sulfuric acid for blue, rare for red light purple, have precipitation. Used for dyeing and printing of cellulose fiber, suitable for polyester/cotton, polyester/stick a bath of blended dyeing of step, it can also be used in paper color

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