Caesium acetate or cesium acetate is an ionic caesium compound with the molecular formula CH3CO2Cs. It is often used in organic synthesis especially in Perkin synthesis: the formation of unsaturated cinnamic-type acids by the condensation of aromatic aldehydes with fatty acids.
Molar mass：191.949 g/mol
Density：2.423 g/cm3, solid
Melting point：194 °C (381 °F; 467 K)
Boiling point：945 °C (1,733 °F; 1,218 K)
Solubility in water：945.1 g/100 g (−2.5 °C);1345.5 g/100 ml (88.5 °C)
Crystal structure：Primitve hexagonal
Cesium acetate is used in organic synthesis especially in the Perkin reaction to prepare unsaturated cinnamic-type acids. It is used in petroleum drilling fluids as an alternative to cesium formate. In organometallic chemistry, it is an additive for metal-ctalyzed coupling reactions. It is also used in the inversion of stereo chemistry of secondary alcohols.