Used primarily as an intermediate in organic synthesis, especially in the pharmaceutical and agrochemical industries. It serves as an acylating agent to introduce the 2-bromobutyryl group into molecules, enabling further transformations such as cyclization or chain elongation. Its reactivity makes it valuable for constructing complex organic frameworks, including heterocycles and bioactive compounds. Commonly employed in the preparation of ketones, esters, and amides through reactions with alcohols or amines. Due to the presence of both bromine and chloride, it allows sequential substitution reactions, offering versatility in multi-step syntheses. Handle with care due to its moisture sensitivity and corrosive nature.