C.I. Acid Brown 234

2-Amino-4,6-dinitrophenol diazo, and N-(4-hydroxyphenyl)acetamide coupling, and then translate into 1:2 nickel complex.

Dark brown. soluble in water and ethanol is red light brown, the strong sulfuric acid for orange brown; For dark red light after diluted orange; Join the hydrochloric acid solution with brown precipitation, add sodium hydroxide to red, and then into a brown precipitation.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	6	3	4	4-5	4-5	4-5