4-Amino-5-hydroxy-6-[(2,3,5-trichloro-6-hydroxyphenyl)azo]-1,3-naphthalenedisulfonic acid disodium salt

2-Amino-3,4,6-trichlorophenol diazotization, and 4-Amino-5-hydroxynaphthalene-1,3-disulfonic acid coupling.

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

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	3-4	6	4-5		5	5