Used primarily as an intermediate in the synthesis of pharmaceuticals, particularly in the development of benzimidazole-based drugs. It plays a key role in creating compounds with antiparasitic, antiviral, and anticancer properties. Its reactive chloromethyl group allows for easy attachment to other molecular structures, making it valuable in medicinal chemistry for building complex drug molecules. Commonly utilized in research settings to develop proton pump inhibitors and anthelmintic agents. Also employed in the preparation of ligands for catalysis and in the formation of ionic liquids for specialized reactions.