Used as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and agrochemicals. It serves as an acylating agent, facilitating the introduction of the 3-chloropropionyl group into various substrates. Its reactivity makes it valuable in forming esters and amides under controlled conditions. Also employed in the synthesis of biologically active molecules where the chlorine functionality allows for further derivatization. Due to its sensitivity to moisture, it is typically handled under anhydrous conditions in industrial and laboratory settings.