Ketorolac Impurity 56 CAS CATO-C4X-166956
| CAS No. | CATO-C4X-166956 |
| Molecular Formula | C20H22ClNO5 |
| Molecular Weight | 391.85 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Ketorolac Impurity 56 (CAS CATO-C4X-166956) is a certified pharmaceutical impurity reference standard with the molecular formula C20H22ClNO5 and a molecular weight of 391.85 g/mol.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, Ketorolac Impurity 56 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 391.85 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C20H22ClNO5 |
| Molecular Weight | 391.85 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Ketorolac Standards
- Ketorolac Impurity 73 (CAS CATO-C4X-166973)
- Ketorolac Impurity 46 (CAS 144710-34-9)
- Ketorolac Impurity 47 (CAS CATO-C4X-166947)
- Ketorolac Impurity 71 (CAS CATO-C4X-166971)
- Ketorolac Impurity 41 (CAS 136116-84-2)
- Ketorolac Impurity 43 (CAS CATO-C4X-166943)
- Ketorolac Impurity 44 (CAS CATO-C4X-166944)
- Ketorolac EP Impurity E (CAS 167105-80-8)
Recommended Standards
- Avanafil Impurity 89 (CAS 2250243-36-6)
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- Haloperidol impurity 25 (CAS 150214-94-1)
- Anagrelide Impurity 11 (CAS 70380-50-6)
- IMMH-010 Impurity 11 (CAS CATO-C4X-288211)
- Alcaftadine Impurity 3 (CAS 147083-36-1)
- 2-Methoxy-4,5-dihydro-1H-imidazole-4,4,5,5-d4 (CAS 402788-68-5)
- 2-Amino-5-chloropyridine-3-thiol (CAS 110402-26-1)
- 1-(2-methyl-6-nitrophenyl)ethan-1-one (CAS 4127-55-3)
- 1-Butyl-3-nitro-1H-pyrazole-4-carbonitrile (CAS 61717-03-1)
- 2-(Aminomethyl)-5-(difluoromethyl)-6-iodo-3-nitropyridine (CAS 1805599-83-0)
- 2-(4-Methylphenyl)-N-{2-[(4-methylphenyl)sulfanyl]ethyl}acetamide (CAS 477886-00-3)
- Ginseng Tetrapeptide (CAS 178553-95-2)
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