Preparation
2,4,6-Trichloro-1,3,5-triazine first and 3-Amino-4-hydroxybenzenesulfonamide diazo, and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid and coupled the product of condensation, then and C.I. Mordant Yellow 12 (C.I. 14045) condensation, and finally with aniline condensation.