Glycine ethyl ester hydrochloride is widely used in organic synthesis as a building block for peptides and other complex molecules. It serves as a key intermediate in the production of pharmaceuticals, particularly in the synthesis of active pharmaceutical ingredients (APIs) and peptide-based drugs. The compound is also utilized in the preparation of esters and amides, which are essential in various chemical reactions. Additionally, it finds application in biochemical research for modifying proteins and peptides to study their structure and function. Its role in facilitating esterification and amidation processes makes it valuable in both industrial and laboratory settings.