This chemical is widely used in bioconjugation and drug delivery systems due to its polyethylene glycol (PEG) chains, which enhance solubility and stability of biomolecules. It is particularly effective in modifying proteins, peptides, and other therapeutic agents to improve their pharmacokinetics and reduce immunogenicity. The multi-arm PEG structure allows for efficient attachment of multiple functional groups or targeting moieties, making it valuable in creating complex drug delivery platforms. Additionally, it is utilized in the development of hydrogels and other biomaterials for tissue engineering and regenerative medicine applications. Its ester group further enables easy conjugation with various molecules, facilitating its use in controlled-release formulations and diagnostic tools.