mPEG-NH2 is widely used in the field of bioconjugation, where it is employed to modify proteins, peptides, and other biomolecules to enhance their solubility, stability, and circulation time in the body. This chemical is particularly valuable in drug delivery systems, as it can be conjugated to therapeutic agents to reduce immunogenicity and improve pharmacokinetics. Additionally, mPEG-NH2 is utilized in the development of hydrogels and other biomaterials for tissue engineering, where it helps to create biocompatible and biodegradable scaffolds. Its amine group allows for easy functionalization, making it a versatile tool in various biomedical applications.