Used primarily as a gasoline additive to increase octane rating and reduce engine knocking. Enhances combustion efficiency and lowers emissions of carbon monoxide and hydrocarbons in older, non-catalyst-equipped vehicles. Serves as a solvent in organic synthesis and extraction processes due to its low boiling point and ability to mix with both aqueous and organic phases. Commonly used in laboratories for liquid-liquid extractions and as a reaction medium. Also employed in the production of pharmaceuticals and agrochemicals as a processing solvent.