Direct Brown 146

N,N’-bis(3-aminophenyl)urea double nitriding, first and 2,4-Diaminobenzenesulfonic acid coupling, again with Benzene-1,3-diamine coupling.

brown. For yellow brown soluble in water, soluble in ethanol olive yellow light brown. The strong sulfuric acid in red orange for brown, diluted yellow brown to orange for brown. The dye solution to join strong hydrochloric acid for brown, have precipitation; Add thick sodium hydroxide solution with olives brown precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	2	5	1	3		3