This compound is primarily used in peptide synthesis as a protected form of lysine. The Z-group (benzyloxycarbonyl) acts as a protecting group for the amino function, preventing unwanted reactions during peptide bond formation. It is particularly useful in solid-phase peptide synthesis (SPPS) and solution-phase synthesis, where selective deprotection is required. The hydrochloride salt form ensures stability and solubility in various reaction conditions. It is also employed in the preparation of modified peptides and peptide-based drugs, where lysine residues play a critical role in biological activity. Additionally, it finds application in the study of enzyme-substrate interactions and the development of peptide-based biomaterials.