Used as a strong acid catalyst in organic synthesis, particularly in reactions requiring high acidity and stability under harsh conditions. It is employed in the production of specialty chemicals, including pharmaceuticals and agrochemicals, due to its ability to facilitate complex reactions. It is also utilized in the synthesis of polymers and as an electrolyte component in fuel cells, where its high proton conductivity is advantageous. Additionally, it serves as a reagent in the preparation of fluorinated compounds, which are valuable in various industrial applications.