Used primarily as an intermediate in the synthesis of X-ray contrast agents. Its high iodine content enhances radiopacity, making it valuable in developing water-soluble contrast media for diagnostic imaging such as CT scans and angiography. The reactive dichloride groups allow for polymerization or attachment to other molecules, enabling the formation of larger, stable compounds suitable for intravenous administration. Due to its reactivity, it is handled under controlled conditions during pharmaceutical manufacturing.