This compound is primarily utilized in the field of bioconjugation and organic synthesis, where it serves as a valuable building block for creating complex molecules. Its structure, featuring a t-butyl ester group and PEG spacer, makes it particularly useful for enhancing solubility and stability in aqueous environments. It is often employed in the development of drug delivery systems, where it helps improve the pharmacokinetic properties of therapeutic agents. Additionally, it is used in the synthesis of peptide-based drugs and biomaterials, enabling the attachment of functional groups or targeting moieties. Its versatility also extends to research applications, such as the modification of proteins and antibodies for diagnostic and therapeutic purposes.