N-Carbobenzoxy-1,12-diaminododecane Hydrochloride is a mono-protected long-chain diamine primarily utilized in peptide synthesis and bioconjugation. The carbobenzoxy (Cbz) group protects one amino group, leaving the other as the hydrochloride salt for selective coupling reactions. It helps prevent unwanted side reactions during peptide bond formation, ensuring efficient synthesis. This compound is particularly valuable for introducing hydrophobic alkyl spacers in complex peptides, proteins, and bioactive molecules, where selective protection and deprotection are essential. It also finds applications in pharmaceutical intermediates and drug discovery, supporting advancements in biochemical research. Its stability and compatibility with standard synthetic protocols make it a reliable reagent in organic and medicinal chemistry.