3,5-Dinitro-p-toluenesulfonic acid, 2,6-dinitro-p-toluenesulfonic acid, 2,6-dinitrotoluene-4-sulfonic acid, EINECS 201-866-4, 2,6-Dinitro-toluol-4-sulfonsaeure, 3,5-Dinitro-4-methylbenzenesulfonic acid, 2,6-Dinitro-p-toluenesulphonic acid, p-Toluenesulphonic Acid PTSA