3-Hydroxy-2,4,6-triiodobenzoic acid is a specialized organic compound featuring a benzoic acid core substituted with three iodine atoms and a hydroxyl group. This unique structure makes it a valuable intermediate in the synthesis of contrast agents for medical imaging, particularly in X-ray and computed tomography (CT) applications.

With a molecular weight of 499.81 g/mol, this compound is characterized by its high iodine content, which contributes to its radiopaque properties. It is typically a white to off-white crystalline powder, soluble in organic solvents but sparingly soluble in water. Its stability and reactivity make it a key building block in the production of iodinated contrast media.