Used in bioconjugation and drug delivery systems, it serves as a linker molecule to attach drugs, proteins, or other biomolecules due to its reactive end groups. The PEG (polyethylene glycol) segment enhances solubility, reduces immunogenicity, and improves stability of the conjugated product. It is also employed in surface modification to create biocompatible coatings for medical devices. Additionally, it is utilized in nanotechnology for the development of targeted therapeutic nanoparticles. Its bifunctional nature allows for versatile applications in creating custom biomaterials for research and therapeutic purposes.