Used as a bifunctional crosslinking agent in bioconjugation, particularly for linking peptides, proteins, or other biomolecules. The compound contains an activated succinimide ester and a carboxylic acid group, enabling efficient amide bond formation with primary amines on target molecules. Commonly applied in the development of antibody-drug conjugates (ADCs), diagnostics, and targeted therapeutics where controlled linker stability and solubility are required. Its spacer arm length provides flexibility in molecular design, improving binding efficiency and reducing steric hindrance. Also utilized in surface modification of nanoparticles and biosensors for enhanced biomolecule immobilization.