Direct Orange 5

Подготовка

aniline diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling, and then diazo, and 5-Oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid?coupling.

Свойства и приложения

yellow orange. Moderate soluble in water for palm light orange, slightly soluble in alcohol. The strong sulfuric acid for orange red, to orange diluted. The dye solution to join strong hydrochloric acid have brown light orange precipitation; Add thick sodium hydroxide solution for orange brown. Can be used for cotton dyeing, good levelness. Neutral and alkaline white is very good. Hard to sensitive.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	4	4	3	1-2		2