Widely used as a biocide and disinfectant due to its strong antimicrobial properties. Effective against bacteria, fungi, and algae, making it suitable for industrial water treatment systems, cooling towers, and metalworking fluids. Also serves as a key intermediate in the synthesis of pharmaceuticals, agrochemicals, and other halogenated organic compounds. Its reactivity allows for further functionalization in fine chemical manufacturing, particularly in cross-coupling reactions for drug development. Additionally, employed in research settings as a derivatizing agent for analytical detection of certain biomolecules.