m-PEG8-ethoxycarbonyl-propanoic acid is widely used in bioconjugation and drug delivery systems due to its biocompatibility and water solubility. It serves as a linker molecule, enabling the attachment of therapeutic agents or targeting ligands to nanoparticles or proteins, enhancing their stability and circulation time in the body. In pharmaceutical research, it is utilized to modify peptides, proteins, and small molecules, improving their pharmacokinetic properties and reducing immunogenicity. Additionally, it finds applications in the development of hydrogels and biomaterials for tissue engineering, where it contributes to controlled release mechanisms and scaffold functionalization. Its PEGylation properties also make it valuable in creating stealth liposomes and other nanocarriers for targeted cancer therapy.