7-Amino-4-hydroxynaphthalene-2-sulfonic acid and 2,4,6-Trichloro-1,3,5-triazine condensation, 2-Aminobenzoic acid diazo, and condensation products coupled, again with 2-(2-Sulfo-4-nitrostyryl)-5-aminobenzenesulfonic acid condensation, and translated into chromium complex.
