p-Toluenesulphonic acid monohydrate, min. 98 %, for synthesis, Molar mass (M) 190,22 g/mol, Density (D) 1,345 g/cm³, Flash point (flp) 180 °C, Boiling point (bp) 140 °C, CAS No. [6192-52-5], UN-Nr. 2585, EG-Nr. 203-180-0, Empirical formula C7H8O3S · H2O