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Viscosity measurements on pure propylene carbonate and conductance measurements on solutions of 13 salts in propylene carbonate from low to high concentrations were carried out in the temperature range −45°C ≤ θ ≤ +25°C. Data analysis based on the Vogel‐Fulcher‐Tammann equation yields equal values for the glass transition temperature of propylene carbonate, T0, from both conductance [T0 = (151.6 ± 0.9) K] and viscosity [T0 = (152.3 ± 1.6) K] measurements. The energies of activation of conductance at infinite dilution, E a(italick) (m → 0, T) = (3350 ± 50) [T/(T‐T0)]2 J mol−1, of all the electrolyte solutions investigated are independent of the solute and equal to that of the viscosity of the solvent, E a(η) = (3420 ± 50) [T/(T‐T0)]2 J mol−1, at every temperature.