4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, then with 4-Hydroxynaphthalene-1-sulfonic acid diazo, and Benzene-1,3-diamine coupled to a single accidentally coupled nitrogen compounds.
Properties and Applications
red light brown. Soluble in water for dark orange brown. The strong sulfuric acid for purple, dilute after brown precipitation. The dye solution to join strong hydrochloric acid have dark brown precipitation; Add thick with a small amount of sodium hydroxide solution red precipitate.
