Used as a key metabolite in the study of iomeprol, a non-ionic iodinated contrast agent, to assess metabolic pathways and clearance in diagnostic imaging. Helps in evaluating renal function and contrast agent stability in patients undergoing computed tomography (CT) scans. Also employed in environmental studies to detect and quantify pharmaceutical residues in water systems due to its persistence and detectability. Serves as a reference standard in analytical testing for drug metabolism and toxicology research.