Binary vapor-liquid equilibrium data were measured for the 1,1,1-trifluoroethane (HFC-143a)+ propane (HC-290) system at temperature from 313.15 to 363.15 K. These experiments were carried out with a circulating-type apparatus with on-line gas chromatography. The experimental data were correlated well by Peng-Robinson Stryzek-Vera equation of state with the Wong-Sandler mixing rules. This system shows a positive azeotrope and the type I of critical behavior. (c) 2006 Elsevier B.V. All rights reserved.