Preparation
4-Amino-5-hydroxynaphthalene-2,7-disulfonic acidand 2,4,6-Trichloro-1,3,5-triazine condensation chlorine, 2-Aminonaphthalene-1-sulfonic acid diazo, and condensation products coupled, again with a between, 2-(3-Aminophenylsulfonyl)ethyl hydrogen sulfate condensation.
