A new pressure DSC module (Mettler DSC27HP) and its abilities for vapor pressure determination in the range of subambient
pressure to 7 MPa are presented. To compare the new to an established method, vapor pressures of caffeine, naphthalene and
o-phenacetin have been determined both by pressure DSC and the Knudsen effusion cell method. These results, including the
derived heats of evaporation and heats of sublimation, are compared to literature values.