m-PEG10-acid is widely used in bioconjugation and drug delivery systems due to its water solubility and biocompatibility. It is often employed to modify proteins, peptides, and other biomolecules, enhancing their stability and reducing immunogenicity. In pharmaceutical applications, it serves as a linker for attaching therapeutic agents to carriers, improving drug solubility and prolonging circulation time in the body. Additionally, it is utilized in the development of hydrogels and nanomaterials for controlled release formulations. Its reactive carboxylic acid group allows for easy conjugation with amine-containing compounds, making it a versatile tool in biotechnological and biomedical research.