7-Benzoylamino-4-hydroxy-3-[[4-[(2-chloro-6-methyl-4-sodiosulfophenyl)azo]phenyl]azo]naphthalene-2-sulfonic acid sodium salt

Preparation

4-Amino-3-chloro-5-methylbenzenesulfonic acid diazo, coupled with aniline, its product to diazo, and 7-Benzamido-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications

colourful red blue light. Soluble in water for red, slightly soluble in alcohol. In the dark for the strong sulfuric acid, diluted in red. The dye solution to join strong hydrochloric acid have red orange brown precipitation; Add thick sodium hydroxide solution has the purple precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	5	5	4-5	1-2		1