Fmoc-Cys(Dpm)-OH is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) methods. It serves as a protected cysteine derivative, where the Fmoc group safeguards the amino group, and the Dpm (diphenylmethyl) group protects the thiol side chain of cysteine. This protection is crucial to prevent unwanted side reactions during peptide chain assembly.

The compound is especially valuable in synthesizing peptides containing cysteine residues, which are often involved in forming disulfide bonds essential for the structural stability and biological activity of many proteins. Its compatibility with Fmoc-based SPPS makes it a preferred choice in producing complex peptides for pharmaceutical research, drug development, and biochemical studies.

Additionally, Fmoc-Cys(Dpm)-OH is utilized in the preparation of peptide-based therapeutics, vaccines, and diagnostic tools, where precise control over cysteine incorporation is necessary. Its stability under standard SPPS conditions ensures efficient and reliable peptide synthesis.