This chemical is widely used as a linker or spacer in the development of bioconjugates and drug delivery systems. Its hydrophilic PEG (polyethylene glycol) chain enhances solubility and stability of the compounds it is attached to, making it valuable in pharmaceutical research. It is often employed in the synthesis of antibody-drug conjugates (ADCs) and other targeted therapies, where it helps improve the pharmacokinetic properties of the drug. Additionally, it is utilized in the modification of peptides and proteins to increase their circulation time in the body. Its application extends to materials science, where it is used to create biocompatible surfaces and hydrogels for medical devices and tissue engineering.