Used primarily as an alkylating agent in organic synthesis, enabling the introduction of fluorinated alkyl chains into target molecules. Its dual halogen functionality allows sequential reaction strategies, where the iodide can undergo metal-catalyzed coupling reactions (e.g., Suzuki or Stille) while the fluoride acts as a stable handle or participates in later transformations. Commonly employed in the preparation of fluorinated pharmaceuticals, agrochemicals, and radiotracers due to the metabolic stability imparted by the C–F bond. Also serves as a building block in the synthesis of heterocycles and functionalized polymers.