Quinoline-3-thiol is primarily utilized in the field of organic synthesis as a versatile building block for the creation of various heterocyclic compounds. Its thiol group allows for the formation of sulfur-containing derivatives, which are valuable in the development of pharmaceuticals and agrochemicals. The compound is also explored in material science for the synthesis of organic semiconductors and conductive polymers due to its electron-rich structure. Additionally, quinoline-3-thiol has been studied for its potential use in coordination chemistry, where it acts as a ligand to form metal complexes with applications in catalysis and sensor technology. Its unique properties make it a compound of interest in research and industrial applications.