2,6-Naphthalenedisulfonic acid, 4-hydroxy-3-[(2-methoxy-5-methylphenyl)azo]-, disodium salt

2-Amino-4-methylanisole diazo, and 1-Naphthol-3,7-disulfonic acid?coupling

red. Soluble in water for product red, and adequate soluble in alcohol in red. The strong sulfuric acid for purple, diluted red for quality. In aqueous solution to join strong hydrochloric acid for product red; Add sodium hydroxide into a brown.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	4	4	3	2-3	1		2-3