5-[[4-[(4-Amino-6-sodiosulfo-1-naphthalenyl)azo]-5-methyl-2-methoxyphenyl]azo]-6-hydroxynaphthalene-2-sulfonic acid sodium salt

Preparation

5-Amino-8-nitronaphthalene-2-sulfonic acid diazo, and 2-Amino-4-methylanisole coupling, again diazotization and 6-Hydroxynaphthalene-2-sulfonic acid coupling, and then will the nitro reduction.

Properties and Applications

dark blue and green light blue. Soluble in water for dark purple, slightly soluble in alcohol. The strong sulfuric acid for purple to blue, orange for diluted. Dye with strong hydrochloric acid solution for dark purple, and then to blue light purple precipitation; Add sodium hydroxide solution for violet, then produce powder blue precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	4	4-5	2-3	3-4		3-4