2-Hydroxy-5-[[3-[(2-hydroxy-5,7-disulfo-1-naphtyl)azo]-4-methylphenyl]carbonylamino]benzoic acid trisodium salt

3-Amino-4-methyl-3′-carboxy-4′-hydroxybenzanilide?diazotization, and 2-Naphthol-5,7-disulfonic acid?coupling.

red orange. Soluble in water for golden orange, right amount soluble in ethanol to golden brown. In concentrated sulfuric acid for golden orange, orange for gold after diluted. Dye aqueous solution to join concentrated hydrochloric acid for orange; Join concentrated sodium hydroxide solution for brown light orange.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	2-3	1-2	3		3	4	5