Preparation
7-Aminonaphthalene-1,3,5-trisulfonic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid?coupling, product diazo, Coupled with??m-Toluidine ,and 2,4,6-Trichloro-1,3,5-triazine?condensation, again with 2-Aminobenzene-1,4-disulfonic acid condensation.