It is available in its anhydrous form, and if water has been absorbed, it is easy to dry by heating at 100 °C for two hours in vacuo.

Being highly dissociated, CsF is a more reactive source of fluoride than related alkali metal salts.

As with other soluble fluorides, CsF is moderately basic, because HF is a weak acid.

[9] CsF gives higher yields in Knoevenagel condensation reactions than KF or NaF.

Similarly to potassium fluoride, CsF reacts with hexafluoroacetone to form a stable perfluoroalkoxide salt.