Used as a catalyst in organic synthesis, particularly in esterification and ether formation reactions. Commonly employed in the production of methyl esters from carboxylic acids for analysis by gas chromatography. Acts as a source of boron trifluoride in solution, offering easier handling than the gaseous form. Also utilized in the preparation of other boron-containing compounds and in certain polymerization processes. Its methanol solution provides stability and controlled reactivity in laboratory and industrial applications.