Methanesulphonic acid, min. 99,5 %, for synthesis, Molar mass (M) 96,10 g/mol, Density (D) 1,48 g/cm³, Flash point (flp) 189 °C, Boiling point (bp) 167 °C, CAS No. [75-75-2], UN-Nr. 2586, EG-Nr. 200-898-6, Empirical formula CH4O3S