Preparation
4-(4-Aminophenyl)benzenamine double nitriding, and 2-Hydroxybenzoic acid?coupling, 4-Aminobenzenesulfonic acid diazo, and 4-Methylbenzene-1,3-diamine coupling, its products and producing again 4-(4-Aminophenyl)benzenamine?derivatives coupling.
Properties and Applications
brown. Soluble in water for yellow olive brown, slightly soluble in alcohol. The strong sulfuric acid is a deep in the navy, diluted light orange for subtle stitching. The dye solution to join strong hydrochloric acid have yellow brown precipitation; Add thick sodium hydroxide solution have brown light orange precipitation.
