Used in the preparation of hypersensitive thermoluminescent materials, dosimeters and in the room-temperature oxidation of noble metals using fluorine in anhydrous HF. It is mainly used as a component of molten salts. Lithium fluoride forms the basic constituent of the preferred fluoride salt mixture used in liquid-fluoride nuclear reactors. Lithium fluoride is widely used in PLED and OLED as a coupling layer to enhance electron injection. LiF crystals are transparent to short wavelength ultraviolet radiation, more so than any other material. LiF is therefore used in specialized UV optics.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.