The isothermal vapor + liquid equilibria of carbon dioxide (E)-2-hexenal (a key apple aroma) was measured using a visual equilibrium cell with an analytic methodology. selected isotherms were (313.2, 323.2 and 333.2) K, the pressures assessed ranged from (2.2–9.8) MPa. thermodynamic consistency experimental data verified, uncertainties molar fractions phases estimated. density dynamic viscosity...