Butyric acid, min. 99 %, for synthesis, Molar mass (M) 88,11 g/mol, Density (D) 0,96 g/cm³, Flash point (flp) 71 °C, Boiling point (bp) 162 to 165 °C, CAS No. [107-92-6], UN-Nr. 2820, EG-Nr. 203-532-3, Empirical formula C4H8O2