Used as a catalyst in various organic synthesis reactions, particularly in polymerization and alkylation processes. It facilitates the formation of carbon-carbon and carbon-heteroatom bonds, making it valuable in the production of pharmaceuticals, plastics, and resins. Additionally, it is employed in the synthesis of complex organic compounds, including natural products and fine chemicals. Its role as a Lewis acid enhances reaction efficiency in esterifications and Friedel-Crafts reactions.