Methoxypolyethylene glycol amine is widely used in the pharmaceutical industry for drug delivery systems. It is often conjugated with therapeutic proteins or peptides to enhance their stability, solubility, and circulation time in the body, reducing immunogenicity and improving efficacy. In bioconjugation, it serves as a linker to attach drugs or targeting molecules to nanoparticles or other carriers. Additionally, it is utilized in the development of hydrogels and biomaterials for tissue engineering due to its biocompatibility and ability to modify surface properties. In research, it is employed as a reagent for modifying biomolecules to study their interactions or functions.