This compound is widely used in bioconjugation and drug delivery systems due to its PEG linker, which enhances solubility and reduces immunogenicity. It serves as a spacer in the synthesis of peptide and protein conjugates, improving stability and bioavailability. Additionally, it is utilized in the development of prodrugs, where the t-butyl ester group can be cleaved under specific conditions to release the active drug. Its application extends to polymer chemistry, where it acts as a building block for creating functionalized materials with tailored properties.