This compound is primarily used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected form of tryptophan, where the Fmoc group protects the amino group, and the formyl (For) group protects the indole side chain of tryptophan. This protection is crucial to prevent unwanted reactions during the peptide assembly process. It is widely employed in the production of peptides for research, pharmaceuticals, and biotechnology applications, ensuring high purity and yield of the final peptide product. Its stability and efficiency make it a valuable reagent in the synthesis of complex peptides and proteins.