Preparation
2,4-Diaminobenzenesulfonic acid and 2,4,6-Trichloro-1,3,5-triazine condensation, its product diazo, and 2,5-Bichloro-4-(3-methyl-5-oxo-4,5-dihydropyrazol-1-yl)benzenesulfonic acid coupling, income accidentally nitrogen compounds (2 Moore) and 1,2-Bis(4-amino-2-sulfophenyl)ethene?(1 Moore) condensation.
