Z-Asp(OBzl)-OH is primarily used in peptide synthesis as a protected form of aspartic acid. The benzyl (OBzl) group protects the carboxyl side chain, preventing unwanted reactions during the peptide assembly process. This protection is crucial for ensuring the correct sequence and structure of the peptide. After the peptide chain is formed, the benzyl group can be removed through hydrogenation or other deprotection methods, revealing the free carboxyl group of aspartic acid. This compound is particularly valuable in the production of complex peptides and proteins for research, pharmaceuticals, and biotechnology applications, where precise control over the peptide structure is essential.