This compound is widely used in bioconjugation and chemical biology research. It serves as a linker or spacer in the development of antibody-drug conjugates (ADCs), enabling the attachment of cytotoxic drugs to antibodies for targeted cancer therapy. It is also employed in the modification of peptides, proteins, and other biomolecules to enhance their solubility, stability, or bioavailability. Additionally, it finds applications in the synthesis of probes and sensors for studying biological processes, such as enzyme activity or protein interactions. Its PEG (polyethylene glycol) segment improves biocompatibility and reduces immunogenicity, making it suitable for therapeutic and diagnostic applications.