Diatrizoic Acid 
 
Diatrizoic acid dihydrate USP32
 
CAS No. 50978-11-5
Molecular Formula: C11H9I3N2O4
Molecular Weight: 613.92
 
Specification:
Appearance: White powder
Identification A: The RF value of the principal point obtained from the test solution corresponds to that obtained from the standard solution
Identification B: Violet vapors are evolved
Completeness and colour of solution: Accords with the specification
Water: 4.5% - 7.0% (Hydrous form)
Residue on ignition: <0.1%
Heavy metals: <20ppm
Iodine and iodide: The toluene layer shows no red color
Iodide: <0.02%
Free aromatic amine: Free aromatic amide <500PPm
Assay: 98.0% - 102.0%
 
Uses:
X-ray contrast agents