This chemical is primarily used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected amino acid derivative, where the Fmoc (fluorenylmethyloxycarbonyl) group acts as a temporary protecting group for the amino functionality. The 4-chloro-L-beta-homophenylalanine moiety introduces a modified phenylalanine structure into peptide chains, which can be valuable in designing peptides with specific properties or functions. Its incorporation into peptides is often aimed at enhancing stability, altering binding affinity, or modifying biological activity. This compound is particularly useful in research and development of therapeutic peptides, where structural modifications are explored to optimize drug efficacy and specificity. Additionally, it finds application in the study of enzyme-substrate interactions and protein engineering, where tailored amino acid sequences are required for experimental or industrial purposes.