Preparation
4-(4-Aminophenyl)benzenamine double nitriding, in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?coupling, 4-Aminobenzenesulfonic acid diazo, in alkaline conditions and formation of accidentally coupled nitrogen compounds, again with 3-Acetylamino-N,N-diethylaniline coupling.
Properties and Applications
gray to black. Soluble in water for violet black. The strong sulfuric acid for navy, for violet after diluted. The dye solution to join strong hydrochloric acid have dark purple precipitation; Add thick hydrogen, have blue-ray solution oxidation gray precipitation.
