Quinoline-4-thiol is primarily utilized in the field of organic synthesis and medicinal chemistry. It serves as a key intermediate in the production of various pharmaceuticals, particularly those targeting infectious diseases and cancers. Its thiol group allows for versatile chemical modifications, making it valuable in the development of drugs with enhanced therapeutic properties. Additionally, it is employed in the synthesis of metal complexes, which are studied for their potential applications in catalysis and material science. In research, Quinoline-4-thiol is also explored for its antimicrobial and antioxidant activities, contributing to the development of new treatments and protective agents.