Used in bioconjugation and chemical synthesis, this compound serves as a linker for attaching molecules to proteins, peptides, or other biomolecules. Its pentafluorophenyl (PFP) ester group reacts efficiently with amines, enabling stable amide bond formation. The PEG (polyethylene glycol) spacer enhances solubility and reduces steric hindrance, making it ideal for modifying biomolecules in drug delivery systems, diagnostic tools, and targeted therapies. It is particularly valuable in creating antibody-drug conjugates (ADCs) and other biopharmaceuticals, where precise and stable conjugation is critical.