Caesium acetate

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Caesium acetate[1]
Cesium acetate.png
IUPAC name
Caesium acetate
Other names
Cesium acetate
3D model (JSmol)
ECHA InfoCard 100.020.226
Molar mass 191.949 g/mol
Appearance colourless, hygroscopic
Density 2.423 g/cm3, solid
Melting point 194 °C (381 °F; 467 K)
Boiling point 945 °C (1,733 °F; 1,218 K)
945.1 g/100 g (−2.5 °C)
1345.5 g/100 ml (88.5 °C)
Flash point Non-flammable
Related compounds
Other anions
Caesium formate
Other cations
Lithium acetate
Sodium acetate
Potassium acetate
Rubidium acetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Caesium acetate or cesium acetate is an ionic caesium compound with the molecular formula CH3CO2Cs often used in organic synthesis especially in Perkin synthesis; formation of unsaturated cinnamic-type acids by the condensation of aromatic aldehydes with fatty acids.[2]

It may be formed by the reaction of caesium hydroxide or caesium carbonate with acetic acid. Caesium acetate holds the record for the highest density of an aqueous solution (1010 g CsOAc per 100 mL H2O. i.e. 91% w/w).[citation needed] This is not so much due its molar solubility (only 5.26 M) but more due to its high molar weight. Caesium acetate is occasionally used instead of caesium formate in petroleum drilling fluids.[citation needed]


  1. ^ Weast, Robert C., ed. (1981). CRC Handbook of Chemistry and Physics (62nd ed.). Boca Raton, FL: CRC Press. p. B-91. ISBN 0-8493-0462-8. .
  2. ^ Koepp, E.; Vögtle, F. (1987), "Perkin-Synthese mit Cäsiumacetat", Synthesis: 177, doi:10.1055/s-1987-27880 .

Further reading[edit]

  • Torisawa, Yasuhiro; Okabe, Hiromitsu; Ikegami, Shiro (1984), "Efficient Inversions of Secondary Alcohols using Cesium Acetate and 18-Crown-6", Chem. Lett., 13 (9): 1555–56, doi:10.1246/cl.1984.1555 .

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