The saturated vapor pressure of methyl 4-tert-butylbenzoate was measured from (1.21 to 34.66) kPa in the temperature range from (398.3 to 492.4) K using a Swietoslawski-type ebulliometer. The experimental data were fitted with the Antoine and Clarke-Glew equations, which yielded Antoine parameters (A = 18.031, B = 7261.445, C = 8.857 K) and standard vaporization enthalpy (Delta H-g(l)m(0) (298.15 K) = 57.49 kJ mol(-1)), respectively. The critical properties were estimated on the basis of group contribution method. The acentric factor was calculated using these critical parameters and the saturated vapor pressures with the Antione equation. Furthermore, density, refractive indices, and viscosity of methyl 4-tert-butylbenzoate were also measured in the temperature range of 293.15 to 353.15 K. Temperature-dependence correlation equations for the density (second-order polynomial equation) and viscosity (Vogel-Tamman-Fulcher) were proposed. Modified Rackett equation was used with group contribution, methods to predict the density of methyl 4-tert-butylbenzoate. Group contributions and group interactions method of Nannoolal et al. were used to predict the viscosity in the temperature range of 293.15 to 353.15 K.