Amberlyst 15 ion-exchange resin is widely used in various chemical processes due to its strong acidic properties and stability. It is commonly employed as a catalyst in organic synthesis, particularly in esterification, alkylation, and hydration reactions. In the production of biodiesel, it facilitates the transesterification of vegetable oils or animal fats with methanol. The resin is also utilized in the purification and separation processes, such as removing metal ions or impurities from solutions in water treatment and industrial applications. Additionally, it serves as a solid acid catalyst in petrochemical refining processes, including the isomerization of alkanes and the production of ethers like MTBE. Its reusability and efficiency make it a preferred choice in sustainable and cost-effective chemical manufacturing.