2,7-Naphthalenedisulfonic acid, 4,4'-[(2,2'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(2,1-diazenediyl)]bis[3-hydroxy-, sodium salt (1:4)

4-(4-Amino-2-chlorophenyl)-3-chlorobenzenamine double nitriding, and 3-Hydroxynaphthalene-2,7-disulfonic acid (2 Moore) coupled.

red. Soluble in water for orange red, in very low in alcohol for light pink solubility, insoluble in acetone and toluene. The strong sulfuric acid for quality in red, for orange red after diluted. In water solution to join strong hydrochloric acid for red; With sodium hydroxide for red orange brown.

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