C.I. Direct green 21

Подготовка

4-(4-Aminophenyl)benzenamine double nitriding, coupled with 2-Hydroxybenzoic acid?, and then and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-1,3-disulfonic acid coupling.

Свойства и приложения

dark green. Soluble in water for SAP green, slightly soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid in the dark for the light blue, green for blu-ray diluted, accompanied by precipitation;?Dye solution was added 10% sodium hydroxide solution as a pale red brown.

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