NH2-PEG-OH is widely used in bioconjugation and drug delivery systems due to its dual functional groups. The amino group (-NH2) allows for covalent attachment to various biomolecules, such as proteins, peptides, or drugs, while the hydroxyl group (-OH) provides hydrophilicity and solubility. This chemical is commonly employed to modify the surface of nanoparticles, enhancing their stability and biocompatibility for targeted drug delivery. It is also utilized in the development of PEGylated therapeutics, where it helps prolong circulation time in the bloodstream and reduce immunogenicity. Additionally, NH2-PEG-OH serves as a linker in the synthesis of hydrogels and other biomaterials, enabling the creation of scaffolds for tissue engineering and regenerative medicine applications. Its versatility makes it a valuable tool in biomedical research and pharmaceutical development.