Direct blue 83 (C.I. 34230)

Подготовка

2-Aminobenzene-1,4-disulfonic acid diazo, and Naphthalen-1-amine coupling, again diazo, and?5-Amino-7-ehtoxy-2-naphthalenesulfonic acid?coupling, its product to diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.

Свойства и приложения

green light blue. Soluble in water for blue, slightly soluble in ethanol, insoluble in other organic solvents. The strong sulfuric acid for blue, green for dark blue after diluted. The dye water solution is blue, join strong hydrochloric acid blue precipitation; Add thick sodium hydroxide solution for violet blue.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	5	5	5	2		2