Amino-PEG12-amine is widely used in bioconjugation and drug delivery systems due to its dual amine functional groups and long polyethylene glycol (PEG) spacer. It serves as a linker for attaching bioactive molecules, such as drugs, peptides, or proteins, to nanoparticles or other carriers, enhancing solubility and stability. In targeted therapy, it helps reduce immunogenicity and prolong circulation time in the bloodstream. Additionally, it is utilized in surface modification of materials to improve biocompatibility for biomedical applications. Its hydrophilic PEG chain also makes it valuable in creating hydrogels for tissue engineering and controlled release systems.