This compound is primarily used in peptide synthesis as a protected form of serine. It serves as a building block for creating custom peptides, which are essential in biochemical research and drug development. The ethyl ester group protects the carboxyl functionality, while the hydrochloride salt ensures stability and solubility during reactions. It is particularly useful in solid-phase peptide synthesis (SPPS) for constructing peptide chains with high precision. Additionally, it finds applications in the study of enzyme mechanisms and protein interactions, aiding in the development of therapeutic agents and biomaterials.