Used as a reactive intermediate in organic synthesis, particularly in the preparation of dyes and pigments due to its ability to form covalent bonds with nucleophiles like amines and thiols. Its vinyl sulfone group enables Michael addition reactions, making it valuable in the development of functional polymers and crosslinking agents. Also employed in biochemical applications for modifying proteins and peptides, where it acts as a labeling or immobilization reagent. Additionally, it serves as a building block in the synthesis of pharmaceuticals and agrochemicals requiring aromatic sulfone scaffolds.