ABZ-GLY-OH HCl is primarily used in peptide synthesis as a protected amino acid derivative. It serves as a building block for constructing larger peptide chains, where the ABZ (aminobenzoic acid) group acts as a protective group to prevent unwanted reactions during the synthesis process. This compound is particularly useful in solid-phase peptide synthesis (SPPS), where it helps ensure the correct sequence of amino acids is maintained. Additionally, it finds applications in research and development for creating peptide-based drugs, biomaterials, and bioactive compounds. Its stability and ease of deprotection make it a valuable tool in organic and medicinal chemistry laboratories.