Used as a hydrophilic linker in pharmaceutical and polymer chemistry, particularly in the design of prodrugs and functionalized nanoparticles. Its polyether chain provides water solubility and flexibility, making it suitable for bioconjugation applications where improved pharmacokinetics or reduced aggregation is desired. Commonly employed in the synthesis of PEG-like spacers to enhance biocompatibility and circulation time of drug conjugates. Also utilized in surface modification of nanomaterials to stabilize dispersions in aqueous environments.