ACID VIOLET 7

Подготовка

N-(4-aminophenyl)acetamide diazo, and 4-Acetamido-5-hydroxynaphthalene-2,7-disulfonic acid coupling.

Свойства и приложения

red light purple. Deep red powder. Soluble in water is blue light red to red. Slightly soluble in ethanol, acetone and soluble fiber element, insoluble in other organic solvents. Meet strong sulfuric acid is blue light red, diluted is bright red; Meet nitric acid solution for scarlet to orange. Its solution and strong hydrochloric acid is product red; Add sodium hydroxide solution is orange brown. Dyeing copper and iron ion in its colour and lustre the former micro blue dark, the latter slightly shallow, encounter chromium ion little influence. Good levelness. Used for wool, silk, polyamide fiber and leather, paper, soap, wood, medicine and cosmetics of dyeing, can also be used for the biological dyeing.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	4	2	4	2-3	1	4	2	2
AATCC	4	2	2	1	1	1	2	2