Experimental speeds of sound and densities are presented for the liquid phase of 1-iodohexane. The measurements were carried out along nine isotherms from (293.15 to 413.15) K at pressures from the saturation condition up to 200 MPa. The speed of sound was measured by a pulse-phase echo ultrasonic device at a frequency of (1 to 5) MHz with an uncertainty of +/- 0.2%. The density was measured by an acoustic piezometer with an uncertainty of +/- 0.3%. The experimental results have been used to calculate the isentropic compressibility, kappa(S).