Liquid-liquid and solid-liquid equilibrium data of the CH3CH2OH + Cs2CO3 + H2O system were determined at (0, 20, and 40) degreesC. It was found that the effect of the temperature on the phase equilibrium was insignificant within the investigated range. The binodal curves were correlated using a five-parameter equation, and the tie lines were fitted using the Othmer-Tobias and Bancroft correlations. A sample of the solid phase analyzed by TGA showed that it was Cs2CO3.3.5H(2)O. The refractive index for the systems was also determined.