Used in organic synthesis to introduce the 4-bromobutyryl group into molecules, particularly in the production of pharmaceuticals and agrochemicals. Acts as a key intermediate in the preparation of various compounds, including active pharmaceutical ingredients (APIs). Employed in the synthesis of peptides and other biologically active molecules, where it serves as a building block. Also utilized in the development of polymers and specialty chemicals, contributing to the modification of material properties. Its reactivity with nucleophiles makes it valuable in creating complex organic structures for research and industrial applications.