Used as a linker in bioconjugation, enabling the attachment of biomolecules like proteins, peptides, or antibodies to other molecules or surfaces. Its polyethylene glycol (PEG) spacer enhances solubility and reduces immunogenicity, making it valuable in drug delivery systems. It also improves the stability and bioavailability of therapeutic agents. Commonly applied in the development of antibody-drug conjugates (ADCs), targeted therapies, and diagnostic probes. Its hydrophilic nature helps in minimizing non-specific interactions, ensuring efficient and precise molecular targeting.