Bromoethane is primarily used as an ethylating agent in organic synthesis, where it introduces the ethyl group into various compounds. It is commonly employed in the production of pharmaceuticals, agrochemicals, and other organic intermediates. In the pharmaceutical industry, it is utilized to synthesize active pharmaceutical ingredients (APIs) by ethylation reactions. Additionally, it serves as a solvent in certain chemical processes and is used in the preparation of dyes and fragrances. In the past, it was used as a refrigerant and anesthetic, though these applications have largely been phased out due to safety concerns. Its role in organic synthesis remains significant, particularly in laboratory settings for research and development purposes.