disodium 8-(phenylamino)-5-[[4-(phenylazo)-7-sulphonato-1-naphthyl]azo]naphthalenesulphonate

Preparation

aniline diazo, and 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 8-(Phenylamino)naphthalen-1-ol ? coupling.

Properties and Applications

red light navy blue. For purple soluble in water, soluble in ethanol as dark blue, soluble in acetone, slightly soluble in soluble fiber element, insoluble in other organic solvents. In the dark for the strong sulfuric acid, diluted to blue. In nitric acid solution for yellow brown. In water solution to join strong hydrochloric acid for dark; Add thick sodium hydroxide solution for deep red.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	5	3-4	3	3-4	3-4		4
AATCC	5	3	3	4	4		4-5