Nippon Brown BK

4-(4-Aminophenyl)benzenamine double nitriding, and 4-Hydroxynaphthalene-1-sulfonic acid diazo, and Benzene-1,3-diamine coupled to a single accidentally nitrogen compounds (2 Moore) coupled.

red light brown. Soluble in water for red light brown. The strong sulfuric acid to red light purple, dilute after brown precipitation. The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution without change.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	3	4	2	1-2		1