The saturated vapor pressure of pure 3,5-dichloroaniline was measured from (10.25 to 95.81) kPa in the temperature range from (446.60 to 534.94) K using an ebulliometer. The results were fitted by an Antoine equation using a nonlinear least-squares regression method. The calculated saturated vapor pressure agrees well with the experimental values. The ideal gas molar enthalpy and ideal gas entropy of vaporization (Delta H-idl(g)m, Delta S-idl(g)m) of 3,5-dichloroaniline in the temperature range from (446.60 to 534.94) K were calculated by the combination of the Clausius Clapeyron equation and Antoine equation.