Used as a biocide and antifungal agent in industrial water systems and coatings. Effective in controlling microbial growth in paints, adhesives, and wood preservatives. Also applied in the synthesis of pharmaceutical intermediates, particularly for antimalarial and antimicrobial drugs, due to its heterocyclic quinoline structure. Shows activity against a range of bacteria and fungi, making it suitable for use in antifouling paints and industrial disinfectants.