Direct Green 43

Подготовка

5-Acetamido-8-amino-2-naphthalenesulfonic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, again diazo, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, its product to diazo, and 2-Methyl-2H-indazole coupling, and then hydrolysis acetyl amino.

Свойства и приложения

dark blue light green. Soluble in water for dark green light grey-blue, soluble in ethanol.concentrated sulfuric acid in light gray black, Gray light purple for diluted. The dye solution to join strong hydrochloric acid have blue-ray black precipitation, add thick sodium hydroxide solution for red light blue-black, precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
AATCC	3	3-4	3	4		4