Preparation
mixed 5-Aminonaphthalene-2-sulfonic acid diazo, coupled with aniline, product to diazo, Coupled with resorcinol, double accidentally nitrogen compounds; 4-Nitrobenzenamine diazo, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?coupling, again diazo, and the double accidentally coupled nitrogen compounds; 4-Nitrobenzenamine diazo, and the income four accidentally nitrogen compounds coupling.
