EINECS 244-933-3, 2-Hydroxy-toluol-4-sulfonsaeure, p-toluenesulfonic acid hydrate, 4-methylbenzenesulfonic acid hydrate, 2-Hydroxy-4-methylbenzenesulphonic acid, 3-Hydroxy-toluol-4-sulfonsaeure, 2-hydroxy-toluene-4-sulfonic acid, p-Toluenesulfonic acid,2-hydroxy