A four-parameter corresponding-states-principle framework has been employed to improve the thermophysical properties prediction of the polar halogenated hydrocarbons(halocarbons). The equation of state used here is the Benedict-Webb-Rubin-Starling(BWRS) equation. Reduced dipole moment is considered as the fourth parameter. And its constants have been generalized. The newly developed correlation with the generalized constants exhibits improved predictions of density, enthalpy and expecially vapor pressure for halocarbons with high dipole moment without a sacrifice of predictability on low polar halocarbons.