Wax precipitation inside the pipelines can partially block the oil flow and create serious safety and financial issues for the oil and gas industry. Thermophysical properties of n-alkanes are required to predict wax precipitation and deposition behavior accurately. Several correlations have been proposed based on limited experimental data reported in the literature. This work aims to conduct experiments to collect thermophysical properties for pure n-alkanes with carbon numbers ranging from 17 to 50 using a micro differential scanning calorimeter and validate the available correlations. It was found that a simple correlation that is a function of carbon number or molecular weight could predict the temperature of fusion with reasonable accuracy. However, significant errors were observed with existing correlations to predict the enthalpy of fusion and solid-solid transition, so a correction was proposed for the enthalpy of fusion, and a set of correlations was developed for the enthalpy of solid-solid transition.