MS-PEG7-MS is widely used in bioconjugation and drug delivery systems due to its ability to link molecules while improving solubility and stability. It is commonly employed in the modification of proteins, peptides, and antibodies to enhance their therapeutic efficacy and prolong circulation time in the body. Additionally, it serves as a crosslinker in the development of hydrogels for tissue engineering and controlled drug release applications. Its PEG (polyethylene glycol) chains reduce immunogenicity and prevent rapid clearance by the immune system, making it valuable in targeted cancer therapies and diagnostic imaging. Furthermore, it is utilized in nanotechnology for surface functionalization of nanoparticles to improve biocompatibility and targeting efficiency.