Fmoc-Sar-OH is widely used in peptide synthesis as a building block for introducing sarcosine residues into peptide chains. It is particularly valuable in solid-phase peptide synthesis (SPPS) due to its Fmoc (9-fluorenylmethoxycarbonyl) protecting group, which can be easily removed under mild basic conditions. This compound is employed in the development of peptides for pharmaceutical research, enabling the study of peptide structure-activity relationships and the creation of peptide-based drugs. Additionally, it is used in the synthesis of peptidomimetics, which are designed to mimic the structure and function of natural peptides, aiding in drug discovery and development. Its application extends to the production of modified peptides for biochemical studies, where sarcosine incorporation can influence peptide stability, solubility, and biological activity.