This chemical is widely used in the field of bioconjugation and drug delivery due to its polyethylene glycol (PEG) spacer, which enhances solubility and reduces immunogenicity. It is particularly valuable in the synthesis of peptide-based therapeutics, where it acts as a linker to attach bioactive molecules or drugs to targeting moieties. The Boc (tert-butoxycarbonyl) protecting group allows for selective deprotection during multi-step organic synthesis, enabling precise control over the conjugation process. Its application extends to the development of antibody-drug conjugates (ADCs), where it helps maintain the stability and efficacy of the payload. Additionally, it is utilized in the creation of hydrogel matrices for controlled drug release systems and in surface modification of nanoparticles to improve biocompatibility and circulation time in vivo.