Propionic acid, min. 99,5 %, for synthesis, Molar mass (M) 74,08 g/mol, Density (D) 0,99 g/cm³, Flash point (flp) 50 °C, Boiling point (bp) 140,7 to 141,4 °C, CAS No. [79-09-4], UN-Nr. 3463, EG-Nr. 201-176-3, Empirical formula C3H6O2