Sarcosine hydrochloride is widely used in biochemical research as a precursor in the synthesis of glycine and other amino acids. It plays a significant role in studies related to neurotransmission, particularly in modulating NMDA receptor activity, which is crucial for understanding neurological disorders. Additionally, it is employed in the development of pharmaceutical compounds targeting conditions like schizophrenia and depression due to its influence on glycine levels in the brain. In cosmetic formulations, it acts as a buffering agent and helps stabilize pH levels in skincare products. Its application extends to industrial processes, where it serves as an intermediate in the production of surfactants and detergents, enhancing their cleaning efficiency.