Used as a source of iodide ions in chemical synthesis and pharmaceutical formulations. Employed in the preparation of radiopharmaceuticals due to its iodine content, which can be isotopically labeled. Acts as an electrolyte component in some types of solid-state batteries and lithium-ion conducting materials. Also utilized in humidity indicator cards, where it changes color based on moisture levels, helping to monitor environmental conditions during storage and transport of sensitive goods. Its hygroscopic nature makes it suitable for moisture detection applications.