Used as a key reagent in organic synthesis, particularly in bioconjugation and pharmaceutical research. Its maleimide group readily undergoes Michael addition with thiol groups, making it ideal for coupling reactions with cysteine residues in peptides and proteins. The iodoaryl group allows further functionalization via palladium-catalyzed cross-coupling reactions, such as Suzuki or Heck couplings, enabling the construction of complex molecules. Commonly employed in the development of targeted drugs, imaging agents, and antibody-drug conjugates where selective and sequential modifications are required. Also utilized in materials science for modifying surfaces and creating functional polymers.