Chromate(1-), bis[4-[[2-(hydroxy-κO)-5-nitrophenyl]azo-κN1]-2-(phenylazo)-1,3-benzenediolato(2-)-κO3]-, hydrogen

2-Amino-4-nitrophenol diazo, Coupled with resorcinol, its product again with diazo of aniline coupling, and then translate into 1:2 chromium complex.

red light brown. Soluble in water for brown, soluble in ethanol for red light brown. The strong sulfuric acid for orange brown, diluted for orange brown still. Add in aqueous solution hydrochloric acid have red brown precipitation; Add sodium hydroxide in red.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	6	4	4	5	4-5	4