Glycine methyl ester hydrochloride is widely used in peptide synthesis as a building block for creating more complex peptide structures. It serves as a protective group for the carboxyl function of glycine, allowing selective reactions at the amino group. This compound is also utilized in the preparation of pharmaceuticals, particularly in the development of drugs that target neurological and metabolic disorders. Additionally, it plays a role in organic synthesis, where it acts as an intermediate in the production of various fine chemicals and bioactive molecules. Its stability and reactivity make it a valuable reagent in both academic research and industrial applications.