Caesium hydrogen sulfate, with the chemical formula CsHSO4, is a chemical compound composed of caesium (Cs) cations and hydrogen sulfate (HSO4-) anions. It is an ionic compound and belongs to the group of metal sulfates.

Here are some key points about caesium hydrogen sulfate:

1. Structure: Caesium hydrogen sulfate has an ionic crystal structure, consisting of caesium cations (Cs+) and hydrogen sulfate anions (HSO4-) held together by ionic bonds.
2. Physical Properties: Caesium hydrogen sulfate is a white crystalline solid at room temperature. It is sparingly soluble in water.
3. Preparation: Caesium hydrogen sulfate can be prepared by the reaction of caesium carbonate (Cs2CO3) with sulfuric acid (H2SO4).
4. Uses: Caesium hydrogen sulfate has limited practical applications. It is primarily used in research and laboratory settings as a source of caesium cations and hydrogen sulfate anions in various chemical reactions.
5. Toxicity: Caesium compounds, including caesium hydrogen sulfate, should be handled with caution, as caesium is a highly reactive and potentially toxic metal.
6. Environmental Concerns: As with other caesium compounds, the release of caesium hydrogen sulfate into the environment should be avoided, as it can have environmental implications.

Caesium hydrogen sulfate is not widely used in practical applications due to its limited scope and the availability of other more suitable compounds for various purposes. Its toxicity requires careful handling and containment to ensure the safety of those working with the compound. As with any toxic substance, appropriate safety measures should be observed to prevent unnecessary exposure and potential hazards. Additionally, the proper disposal and recycling of caesium-containing materials are essential to prevent environmental contamination.