Caesium hydrate is a compound that is composed of the alkali metal caesium and water. It is commonly used in the chemical industry as a strong base and reducing agent. In chemistry, caesium hydrate is known by various synonyms, such as cesium hydroxide, cesium hydroxide monohydrate, cesium(I) hydrate, and caesium hydroxide monohydrate. Chemical formulae for it include CsOH and CsOH•H2O. These synonyms are often used interchangeably in scientific research and studies. However, it is important to note that variations in the formula and components of caesium hydrate can lead to differences in its properties and uses.