Fluoroantimonic acid is primarily used in research and industrial settings as a superacid catalyst due to its extreme acidity. It is employed in reactions that require protonation of very weak bases or stabilization of highly reactive cations, such as in the study of carbocations and other intermediates in organic chemistry. In petrochemical industries, it facilitates alkylation and isomerization processes, enhancing the production of high-octane fuels. Additionally, it is utilized in the synthesis of specialty chemicals and pharmaceuticals where strong acidic conditions are necessary. Due to its highly corrosive nature, handling requires specialized equipment and strict safety protocols.