(S)-1-Cyclopropylethanamine hydrochloride is primarily used in the pharmaceutical industry as a chiral building block for the synthesis of various active pharmaceutical ingredients (APIs). Its cyclopropyl group and chiral center make it valuable in the development of drugs targeting central nervous system disorders, such as antidepressants and antipsychotics. Additionally, it serves as an intermediate in the production of compounds with potential antiviral and antimicrobial properties. The hydrochloride form enhances its stability and solubility, making it suitable for use in formulation processes. Its application extends to research and development, where it aids in the study of stereochemistry and the design of novel therapeutic agents.