Boc-D-Dap(Boc)-OH·DCHA is a doubly protected derivative of D-2,3-diaminopropionic acid (D-Dap), an unusual non-proteinogenic amino acid, with tert-butoxycarbonyl (Boc) groups shielding both the α-amino and side-chain amino functionalities. Primarily employed in solid-phase peptide synthesis, it acts as a protective agent during peptide bond formation, ensuring selective reactivity and preventing side reactions. This compound is essential for incorporating D-Dap into complex peptide sequences, maintaining structural integrity in custom peptides for research, pharmaceuticals, and biotechnology applications. It is particularly valuable in the development of peptide-based drugs and bioactive molecules, where precise control over reactions is critical for efficacy and safety. The dicyclohexylamine (DCHA) salt improves solubility and ease of handling.