Used as a hydrophilic linker in pharmaceutical and bioconjugation chemistry, enabling the attachment of water-soluble moieties to drugs, peptides, or imaging agents. Its polyethylene glycol (PEG)-like structure enhances solubility and reduces aggregation, making it valuable in the design of prodrugs and targeted delivery systems. Commonly employed in the synthesis of antibody-drug conjugates (ADCs) and diagnostic probes where controlled hydrophilicity and biocompatibility are critical. Also utilized in surface functionalization of nanoparticles and biosensors to minimize non-specific binding and improve stability in biological environments.