Preparation
2,4-Diaminobenzenesulfonic acid and 2,4,6-Trichloro-1,3,5-triazine condensation , product diazo, in alkaline conditions, and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acidcoupling, and 2,4,6-Trichloro-1,3,5-triazine condensation chlorine, then respectively with 3-Aminobenzenesulfonic acid between 5-Amino-1,3-benzenedisulfonic acid?condensation.
