m-PEG17-acid is widely used in bioconjugation and drug delivery systems due to its ability to enhance solubility, stability, and biocompatibility of therapeutic molecules. It is commonly employed to modify proteins, peptides, and small molecules, reducing immunogenicity and extending their circulation time in the body. This compound is also utilized in the development of PEGylated drugs, where it acts as a linker to attach polyethylene glycol (PEG) chains to active pharmaceutical ingredients. Additionally, it finds applications in nanotechnology for surface functionalization of nanoparticles, improving their performance in targeted drug delivery and diagnostic imaging. Its role in improving the pharmacokinetic properties of therapeutics makes it a valuable tool in pharmaceutical research and development.