This chemical is primarily utilized in the field of bioconjugation and drug delivery systems. Its structure, featuring PEG (polyethylene glycol) chains and a sulfone group, makes it highly effective in creating stable linkages between molecules, particularly in the development of antibody-drug conjugates (ADCs). The PEG moieties enhance solubility and reduce immunogenicity, while the sulfone group facilitates selective and efficient conjugation with target molecules. Additionally, the t-butyl ester group provides a protective function during synthesis, which can be easily removed to activate the molecule for further reactions. This compound is also employed in the modification of peptides and proteins to improve their pharmacokinetic properties, making it a valuable tool in therapeutic applications.