The enthalpy and entropy of sublimation of N-ethylthiourea were obtained from the temperature dependence of its vapour pressure measured by both the torsion-effusion and the Knudsen effusion method in the temperature range 360-380K. The compound undergoes no solid-to-solid phase transition or decomposition below 380K. The pressure against reciprocal temperature resulted in lg(p, kPa)=(13.40 +/- 0.27)-(6067 +/- 102)/T(K). The molar sublimation enthalpy and entropy at the mid interval temperature were Delta H-sub(m)(370K)=(116.1 +/- 2.0)kJ mol(-1) and Delta H-sub(m)(370K)=(218.0 +/- 5.2)Jmol(-1)K(-1), respectively. The same quantities derived at 298.15K were (118.8 +/- 2.l)kJmol(-1) and(226.1 +/- 5.5)Jmol(-1) K-1, respectively. (c) 2007 Elsevier B.V. All rights reserved.