Density, Heat Capacity, and Vapor Pressure of Squalane

Abstract New experimental data for squalane, including liquid densities, liquid heat capacities, and saturated vapor pressures, are presented together with their respective uncertainties. Liquid densities were determined from 293.15 K to 453.15 K at pressures up to 20 MPa using an accurate single-sinker magnetic suspension densimeter. Auxiliary measurements were performed with a vibrating tube densimeter from 273.15 K to 363.15 K at ambient pressure, including the correction for sample viscosity. Heat capacities were measured using two differential scanning calorimeters, covering a temperature range from 260 K to 518.6 K. Vapor pressures in the range from 0.21 Pa to 49 Pa were acquired by the static method, spanning a temperature interval from 388 K to 462 K. Correlations for density and heat capacity of liquid squalane developed within this work are discussed and compared to the literature data. A correlation for saturated vapor pressure in the form of the Wagner equation, covering a wide temperature range, was obtained by simultaneously correlating vapor pressures and the relevant caloric data. The choice of exponents used in the Wagner equation is discussed.