Fmoc-Dap(Fmoc)-OH is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a key building block for introducing diamino acid residues into peptide chains. The compound is especially valuable in creating branched peptides or peptide dendrimers due to its dual Fmoc protection, which allows for controlled and sequential deprotection during synthesis. Its application extends to the development of complex peptide structures used in drug discovery, biochemical research, and the study of protein-protein interactions. Additionally, it is utilized in the preparation of peptide-based materials for nanotechnology and biomedical applications, such as drug delivery systems and tissue engineering scaffolds.