Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the production of sulfonamide antibiotics. It plays an important role in the development of active pharmaceutical ingredients (APIs) due to its reactive aldehyde and chlorine functional groups, which allow for further chemical modifications. Commonly employed in the preparation of heterocyclic compounds with biological activity, including herbicides and plant growth regulators. Its structure supports the creation of complex molecules in agrochemical research and development.