sodium 4-[(3-chloro-2-hydroxy-5-nitrophenyl)azo]-1H-naphtho[1,8-de]-1,2,3-triazine-6-sulphonate

2-Amino-6-chloro-4-nitrophenol diazotization, and 4,5-Diamino-1-naphthalenesulfonic acid?coupling, ?Then with nitrous acid to form a triazine compound.

dark blue light green. Soluble in water for bordeaux to jam red, slightly soluble in ethanol to purple. In concentrated sulfuric acid to green light blue, dilution after orange red brown. Dye aqueous solution to join concentrated hydrochloric acid for orange red brown; Join concentrated sodium hydroxide solution for purple black.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	5	4	3-4		5	5	5