Used as an intermediate in the synthesis of pharmaceuticals, particularly in the production of certain antihypertensive and anti-inflammatory drugs. It serves as a building block for heterocyclic compounds due to the presence of both amino and thiol functional groups, which can undergo cyclization reactions. Also employed in the development of dyes and agrochemicals where chlorinated aromatic thiols are required. Its hydrochloride form enhances stability and solubility during synthetic processes.