m-PEG7-Ms is widely used in bioconjugation and drug delivery systems due to its ability to enhance solubility and stability of therapeutic compounds. It serves as a linker in the modification of peptides, proteins, and small molecules, improving their pharmacokinetic properties. In drug development, it aids in prolonging circulation time and reducing immunogenicity. Additionally, it is utilized in the synthesis of prodrugs, enabling targeted release of active agents. Its application extends to surface modification of nanoparticles, enhancing biocompatibility and cellular uptake.