Used primarily as a key intermediate in the synthesis of advanced drug delivery systems, this compound enables the creation of biocompatible and water-soluble linkers in antibody-drug conjugates (ADCs). Its long, flexible polyether chain enhances solubility and reduces immunogenicity, making it ideal for improving the pharmacokinetics of therapeutic molecules. It is also employed in the development of PEGylated pharmaceuticals, where controlled release and extended circulation time are critical. Additionally, it serves as a spacer in diagnostic reagents and biosensors, helping to minimize steric interference while maintaining molecular recognition.