This compound is primarily utilized in peptide synthesis as a protected form of aspartic acid. The benzyl ester groups protect the carboxyl functionalities, allowing selective reactions at other sites during peptide chain assembly. It is particularly useful in solid-phase peptide synthesis (SPPS) and solution-phase peptide synthesis, where precise control over amino acid coupling is essential. The hydrochloride salt form enhances its stability and solubility in organic solvents, facilitating its handling and use in various synthetic protocols. Additionally, it serves as a building block in the preparation of complex peptides and peptidomimetics, which have applications in drug development, biochemical research, and the study of protein interactions.