Bromo-PEG2-NHS ester is widely used in bioconjugation and chemical modification processes due to its reactive NHS ester and bromo functional groups. It is commonly employed to link biomolecules such as proteins, peptides, or antibodies to other substrates or surfaces. The NHS ester reacts with primary amines, enabling covalent attachment, while the bromo group allows for further functionalization or click chemistry reactions. This makes it valuable in drug delivery systems, where it helps create targeted therapeutics by attaching drugs to carriers. Additionally, it is utilized in the development of biosensors and diagnostic tools, where it facilitates the immobilization of biomolecules onto sensor surfaces. Its role in polymer and material science is also notable, as it aids in modifying surfaces to enhance biocompatibility or introduce specific functionalities.