This chemical is widely used in bioconjugation and peptide synthesis due to its unique properties. The thiol group (HS-) allows for specific conjugation with maleimide or other thiol-reactive groups, making it valuable for attaching peptides, proteins, or other molecules to surfaces or other biomolecules. The polyethylene glycol (PEG) spacer enhances solubility and reduces immunogenicity, which is particularly useful in drug delivery systems and therapeutic applications. The Boc (tert-butoxycarbonyl) protecting group ensures selective deprotection during peptide synthesis, enabling controlled reactions. It is commonly employed in the development of targeted drug delivery systems, antibody-drug conjugates, and other biopharmaceuticals where precise molecular assembly is critical.