disodium 4-amino-3-[(2,5-dichlorophenyl)azo]-5-hydroxy-6-(1-naphthylazo)naphthalene-2,7-disulphonate

2,5-Dichlorobenzenamine diazo, and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?in acid conditions coupled, its product again with diazo of Naphthalen-1-amine in alkaline conditions coupled.

Dark blue light green. Soluble in water for blue light green, and partly dissolved in ethanol. The strong sulfuric acid for blue-ray black, diluted change to blue. The dye solution to join strong hydrochloric acid for blue-ray green; Add thick sodium hydroxide solution for red light blue.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	3	3	5	4	4	2	4	5