Preparation
4-(4-Aminophenyl)benzenamine double nitriding, in acid conditions coupled with 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid, 2-Aminobenzenesulfonic acid diazo, in alkaline conditions and the product of the above-mentioned income coupling, and then and 3-Acetylamino-N,N-diethylaniline coupling.
Properties and Applications
black. Soluble in water for violet black. The strong sulfuric acid for navy blue; Diluted into violet. In water solution to join strong hydrochloric acid have dark purple precipitation; Add thick sodium hydroxide solution have green gray precipitation.
