Tetrahydrofuran, ROTICHROM® GC , Molar mass (M) 72,11 g/mol, Density (D) 0,883 g/cm³, Flash point (flp) -21,2 °C, Boiling point (bp) 65 °C, CAS No. [109-99-9], UN-Nr. 2056, EG-Nr. 203-726-8, Empirical formula C4H8O