This chemical is primarily used in the field of bioconjugation and drug delivery systems. It serves as a linker molecule, enabling the attachment of therapeutic agents or targeting moieties to biomolecules such as proteins, peptides, or antibodies. Its PEG (polyethylene glycol) spacer enhances solubility and reduces immunogenicity, making it valuable in improving the pharmacokinetics of drugs. Additionally, the t-butyl ester group provides stability during synthesis, allowing for controlled deprotection under specific conditions. This compound is also utilized in the development of prodrugs, where it aids in the controlled release of active pharmaceutical ingredients. Its applications extend to nanotechnology, where it is used in the functionalization of nanoparticles for targeted drug delivery and imaging.