Used as a key building block in peptide synthesis, particularly in the preparation of modified peptides and proteins where a protected amino group and a carboxylic acid functionality are required. Its long aliphatic chain provides spacing in molecular design, making it valuable in the development of bioconjugates, linkers for antibody-drug conjugates (ADCs), and prodrugs. The Boc-protected amine allows for controlled deprotection under mild acidic conditions, enabling stepwise assembly in solid-phase and solution-phase synthesis. Also employed in the creation of peptidomimetics and as a spacer in bifunctional molecules for pharmaceutical and biochemical research.