Sodium diatrizoate hydrate is primarily used as a contrast agent in medical imaging. It is commonly administered intravenously or orally to enhance the visibility of internal structures during X-ray or computed tomography (CT) scans. Its high iodine content makes it effective in highlighting blood vessels, the urinary tract, and the gastrointestinal system, aiding in the diagnosis of abnormalities such as blockages, tumors, or other structural issues. It is particularly useful in urography to assess kidney function and detect urinary tract disorders. Due to its water-soluble nature, it is easily excreted by the kidneys, minimizing the risk of prolonged exposure. However, it is essential to monitor patients for potential allergic reactions or kidney-related side effects, especially in those with pre-existing conditions.