Used primarily as a reactive intermediate in organic synthesis, especially in the development of specialty polymers and surface coatings. Its highly electron-deficient aromatic ring enhances reactivity in nucleophilic aromatic substitution reactions, making it valuable for creating functional materials with unique stability and electronic properties. Commonly employed in the preparation of fluorinated polymers, which exhibit improved thermal, chemical, and oxidative resistance. Also utilized in bioconjugation chemistry due to the active ester group, enabling efficient coupling with amines under mild conditions for labeling or immobilizing biomolecules. Applied in advanced material science for modifying surfaces with fluorinated groups to achieve water- and oil-repellent properties.