Direct Green 55

Подготовка

4-Nitrobenzenamine diazo, in acid conditions and 4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid matches, will the nitro reduction, and then will get the amino nitrogen compounds for light accidentally gasification.

Свойства и приложения

dark green light blue. Soluble in water for dark blue light red, hardly soluble in alcohol. The strong sulfuric acid for hidden cyan, diluted green light for blue. The dye solution to join strong hydrochloric acid for hidden cyan, have precipitation; Add thick sodium hydroxide solution for red light purple.

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