Amberlyst 15 ion-exchange resin is widely used as a catalyst in organic synthesis due to its strong acidic properties. It is particularly effective in esterification reactions, where it facilitates the conversion of alcohols and acids into esters. This resin is also employed in alkylation processes, helping to form carbon-carbon bonds by reacting alkenes with alkanes or aromatic compounds. Additionally, it finds application in the production of biodiesel, where it catalyzes the transesterification of vegetable oils or animal fats with methanol. In the petrochemical industry, Amberlyst 15 is used for the hydration of alkenes to produce alcohols and for the removal of impurities from hydrocarbon streams. Its robust nature and reusability make it a preferred choice in continuous flow systems and industrial processes.