Used as a hydrophilic linker in bioconjugation and pharmaceutical synthesis, particularly in the development of antibody-drug conjugates (ADCs) and peptide therapeutics. Its polyethylene glycol (PEG)-like structure enhances solubility and improves pharmacokinetic properties of conjugated molecules. The benzyl carbamate group provides a stable yet cleavable attachment point under mild conditions, enabling controlled release of active compounds in targeted drug delivery systems. Commonly employed in solid-phase peptide synthesis and as a spacer to reduce steric hindrance in biomolecular interactions.