N-Methylcyclopropanamine hydrochloride is primarily used in organic synthesis as a building block for the preparation of more complex chemical compounds. It serves as a key intermediate in the development of pharmaceuticals, particularly in the synthesis of drugs that target the central nervous system. Its cyclopropylamine structure is valuable in medicinal chemistry for creating molecules with specific biological activities. Additionally, it is utilized in research settings to explore new chemical reactions and pathways, contributing to advancements in drug discovery and development.