TFP-PEG3-TFP（Cat No.:I044722）is a homobifunctional crosslinker featuring two TFP (tetrafluorophenyl) ester groups connected by a PEG3 (triethylene glycol) spacer. The TFP esters are highly reactive toward primary amines, allowing efficient and stable amide bond formation under mild conditions. The PEG3 linker improves water solubility, reduces steric hindrance, and enhances biocompatibility, making it ideal for conjugating proteins, peptides, or other amine-containing molecules. TFP-PEG3-TFP is commonly used in bioconjugation, surface functionalization, and the development of targeted therapeutics, diagnostics, and biomaterials, offering controlled spacing and minimal background reactivity in aqueous environments.