Indium(III) fluoride is primarily used in the production of specialty glasses and optical materials due to its ability to modify the refractive index and enhance transparency in the ultraviolet and infrared regions. It is also employed as a component in low-melting-point glasses and as a flux in soldering and brazing processes. In the field of electronics, it serves as a precursor for the deposition of indium-containing thin films, which are essential in the fabrication of semiconductors and optoelectronic devices. Additionally, it finds application in the synthesis of other indium compounds and as a catalyst in certain organic reactions.