Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of benzimidazole-based drugs with antiparasitic, antiviral, or anticancer activity. Its reactive carbonyl chloride group allows for easy attachment to amines or alcohols, making it valuable in constructing complex molecules. Commonly employed in research settings to prepare bioactive compounds and functionalized ligands for medicinal chemistry. Also utilized in the creation of enzyme inhibitors due to the benzimidazole core’s affinity for biological targets.