Naphtho[2,1-d]thiazole-8-sulfonic acid, 2-(3-aminophenyl)-7-[(2,4-dimethylphenyl)azo]-6-hydroxy-, monosodium salt

Preparation

2,4-Dimethylbenzenamine diazo, and 2-(3-Aminophenyl)-6-hydroxynaphtho[2,1-d]thiazole-8-sulfonic acid coupling.

Properties and Applications

red. Soluble in water for red or orange brown, slightly soluble in ethanol for red orange. The strong sulfuric acid for product red, diluted becomes shallow or for red orange. The dye solution to join strong sodium hydroxide solution have orange brown precipitation; Join strong hydrochloric acid have article red precipitate or red precipitate.

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