Used primarily as an intermediate in organic synthesis, especially in the production of pharmaceuticals and agrochemicals. It reacts readily with amines and alcohols to form amides and esters, making it valuable in constructing complex molecules. Commonly employed in the preparation of beta-chloro propionic acid derivatives, which serve as building blocks for active ingredients in certain herbicides and drugs. Also utilized in polymer chemistry to introduce reactive functional groups into macromolecules. Due to its high reactivity, it is handled under controlled conditions for safe synthesis applications.