This compound is primarily used in peptide synthesis as a protected form of aspartic acid. The ethoxy groups act as protecting groups for the carboxylic acid functionality, preventing unwanted reactions during peptide bond formation. It is particularly useful in solid-phase peptide synthesis (SPPS) where selective deprotection and coupling steps are required. The hydrochloride salt form enhances its stability and solubility in various solvents, making it easier to handle in laboratory settings. Additionally, it finds application in the development of peptide-based pharmaceuticals and biochemical research, where precise control over amino acid incorporation is essential. Its use ensures high yield and purity in the synthesis of complex peptides.