Used primarily as an intermediate in organic synthesis, especially in the pharmaceutical and agrochemical industries. It serves as an acylating agent to introduce the 3-(methylthio)propionyl group into molecules, which can enhance lipophilicity and influence biological activity. Commonly employed in the preparation of thioether-containing compounds, including certain drug candidates and biologically active molecules. Its reactivity makes it valuable for forming amide and ester derivatives in multi-step synthesis. Handle with care due to its moisture sensitivity and potential for exothermic reactions with nucleophiles.