PVT data of methyl chloride were measured up to 400 MPa at eight isotherms ranging from (298.15 to 573.15) K. Experiments were performed with a thin-walled sample holder under equal pressure, both inside and outside. The volume change of the sample was determined with a separation system at 298.15 K by making use of a magnetic float on mercury and a linear variable differential transformer. The specific volume of methyl chloride varies in this region from (0.8366 to 7.8806) cm(3) center dot g(-1). The uncertainty of data for specific volumes was estimated to be +/- 0.34 % or less. The specific volume data was fitted to the Tait equation of state.