CsOH

CsOH, or cesium hydroxide, is an inorganic compound with the formula CsOH. It is the cesium salt of hydroxide and a very strong base. In water it dissociates completely to give Cs+ and OH-, producing highly alkaline solutions. The solid is typically white and highly hygroscopic.

Physical properties include extreme deliquescence and high solubility in water. Pure CsOH tends to absorb moisture from the air and may form hydrated forms. Its dissolution in water is highly exothermic. In the atmosphere, exposure of CsOH can lead to gradual conversion to carbonate via reaction with carbon dioxide and water.

Chemical properties: as a strong base, CsOH readily deprotonates acids and is used under strongly basic conditions in various chemical syntheses. It reacts with acids to form corresponding cesium salts and water. In aqueous solutions, CO2 absorption can convert CsOH to cesium carbonate (Cs2CO3) over time.

Production and occurrence: CsOH is produced industrially by reacting cesium oxide with water: Cs2O + H2O → 2 CsOH. It is not found free in nature and is typically prepared for laboratory and industrial use as needed.

Uses: CsOH is employed as a strong base for organic synthesis, pH control, and cleaning or processing steps that require highly basic conditions. It can also be used to generate cesium alkoxides from alcohols and to prepare highly basic media for particular reactions.

Safety: cesium hydroxide is caustic and corrosive. It can cause severe skin and eye burns and should be handled with appropriate protective equipment. Spills should be contained, and contact with moisture avoided to minimize heat release and the risk of splattering.