The Lithium Iodide Anhydrous segmentation by application delineates four principal demand drivers: battery manufacturing, pharmaceutical formulations, optical‑material production, and research & development. Battery manufacturing, accounting for roughly 45% of total volume, leverages LiI's high ionic conductivity to improve solid‑state electrolyte performance, especially in next‑generation lithium‑sulfur cells. The pharmaceutical segment, representing about 30%, utilizes the compound’s solubility and radioprotective properties in diagnostic imaging agents and as a source of iodide in thyroid‑related therapies. Optical‑material applications, contributing 15%, depend on LiI’s low refractive index and transparency in the infrared spectrum for lenses, prisms, and fiber‑optic components. Finally, research & development consumes the remaining 10%, where the chemical serves as a reagent in synthesis pathways and as a benchmark material in academic studies. Collectively, these applications shape the market size by translating functional attributes into quantifiable demand, with the battery sector driving the most significant growth trajectory.