1,5-Naphthalenedisulfonicacid,3-[[4-[[4-[(4-amino-5-methoxy-2-methylphenyl)azo]-6(or7)-sulfo-1-naphthalenyl]azo]-1-naphthalenyl]azo]-,trisodiumsalt

3-Aminonaphthalene-1,5-disulfonic acid diazo, and Naphthalen-1-amine coupling, product to diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, again diazo, and 2-Amino-4-methylanisole coupling.

red light navy blue. Soluble in water for purple, slightly soluble in ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid in the green light for black, dark blue light after diluted precipitation; In nitric acid partly dissolved, for red light gray. The dye solution to join strong hydrochloric acid blue precipitation; Add thick sodium hydroxide solution for red lights.

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