Fmoc-β-azido-Ala-OH is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a key building block for introducing azido functional groups into peptides, which are essential for click chemistry applications. The azido group allows for efficient and selective conjugation with alkynes via the copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction, enabling the attachment of various labels, probes, or functional molecules to peptides. This chemical is particularly valuable in the development of bioconjugates, peptide-based drugs, and biomaterials, where precise modifications and functionalizations are required. Its Fmoc-protected amino acid structure ensures compatibility with standard peptide synthesis protocols, making it a versatile tool in chemical biology and drug discovery.