Used in density gradient centrifugation to separate biological molecules like DNA and viruses based on buoyant density. Commonly employed in molecular biology and biochemistry research. Also utilized in medical applications for diagnostic imaging and cancer treatment, particularly in experimental radiotherapy due to its ability to carry radioactive isotopes. Plays a role in the preparation of other cesium compounds and in some types of ion exchange processes. Occasionally used in photoelectric cells and scintillation counters because of its favorable electronic properties.