Used as a hydrophilic linker or spacer in pharmaceutical and biotechnology applications, particularly in the design of prodrugs and antibody-drug conjugates (ADCs). Its polyether structure enhances solubility and improves pharmacokinetic properties of conjugated molecules. Frequently employed to increase the circulation time of drug compounds by reducing aggregation and minimizing nonspecific interactions. Also applied in surface modification of nanoparticles to enhance biocompatibility and stability in aqueous environments.