Used primarily as a building block in organic synthesis, especially in cross-coupling reactions such as Suzuki and Heck reactions, to introduce styrenyl groups into complex molecules. Its iodine functionality allows for selective and efficient bond formation, making it valuable in the development of pharmaceuticals, agrochemicals, and functional materials. Also employed in the synthesis of conjugated polymers and fluorescent dyes due to its vinyl group that can participate in polymerization processes. Its reactivity and structural features make it useful in materials science for creating organic electronic components.