This chemical is widely used in the field of bioconjugation and nanotechnology due to its bifunctional PEG (polyethylene glycol) spacer. It serves as a linker molecule, enabling the attachment of two different molecules or functional groups, such as proteins, peptides, or drugs, while providing water solubility and reducing immunogenicity. Its PEG chain enhances biocompatibility and prolongs circulation time in biological systems, making it valuable in drug delivery systems and targeted therapies. Additionally, it is utilized in the development of hydrogels and biomaterials for tissue engineering and regenerative medicine applications. Its carboxylic acid groups allow for further chemical modifications, facilitating the creation of tailored biomolecules for specific research or therapeutic purposes.