Caesium hydroxide, CsOH

The Caesium hydroxide, CsOH, is produced by the action of the metal on water, or of the sulphate on barium hydroxide. It is a solid, melting at 272.3° C., its latent heat of fusion per mol. Being 1.609 Cal. It is extremely deliquescent, and dissolves in water with evolution of much heat, the heat of solution being 16.423 Cal. At 30° C. the saturated solution contains 75.08 per cent, of the base. A mono-hydrate, melting at 180° C., has been isolated. The heat of formation of the anhydrous compound from its elements is 101.03 Cal.