Used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS), as a protecting group for amino acids. The Fmoc group ensures selective deprotection, allowing for the stepwise construction of peptides. It is also employed in the synthesis of complex peptides and proteins, where precise control over the sequence is critical. Additionally, it finds application in the development of peptide-based drugs and biomaterials, where high purity and specific sequences are essential. Its stability under basic conditions and ease of removal make it a valuable tool in organic and medicinal chemistry research.