Used in infrared spectroscopy as a transparent window material due to its high transmittance in the infrared range. Commonly employed in the construction of optical components such as lenses and prisms for IR instruments. Serves as a scintillation agent in radiation detection devices, particularly in combination with other salts to enhance light output. Utilized in some types of ion-selective electrodes for analytical measurements. Also applied in research settings for crystal growth studies and in the preparation of other cesium compounds for specialized chemical reactions.