Used in specialized photochemical applications due to its sensitivity to light, particularly in certain types of photodetectors and optical sensors. It has been explored in research settings for potential use in radiation detection materials because of the high atomic mass of cesium and iodine, which enhances interaction with gamma rays. Also investigated as a source of iodine in organic chemical reactions, in the synthesis of cesium-containing compounds for catalytic processes, and in the development of alternative materials for perovskite solar cells, where iodide-based complexes play a key role in charge transport and help control crystal defects to improve stability and efficiency. Its instability in moist environments limits widespread industrial use, but it remains of interest in controlled laboratory and experimental technologies.