BOC-ARG(Z)-OH is widely used in peptide synthesis as a protecting group for the amino acid arginine. The BOC (tert-butyloxycarbonyl) group protects the amine functionality, while the Z (benzyloxycarbonyl) group safeguards the guanidine side chain of arginine. This dual protection ensures selective reactions during peptide chain assembly, particularly in solid-phase peptide synthesis (SPPS). It is essential in synthesizing complex peptides and proteins, where precise control over amino acid reactivity is critical. Additionally, it finds applications in the development of pharmaceuticals, including peptide-based drugs, and in biochemical research for studying protein interactions and functions. Its stability under various reaction conditions makes it a valuable reagent in organic and medicinal chemistry.