Aceclofenac Impurity 11 CAS 2517857-21-3
| CAS No. | 2517857-21-3 |
| Molecular Formula | C20H22Cl2N2O2 |
| Molecular Weight | 393.31 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Aceclofenac Impurity 11 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
CATO supplies Aceclofenac Impurity 11 (CAS 2517857-21-3), a pharmacopoeial impurity reference standard (molecular formula C20H22Cl2N2O2, MW 393.31 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C20H22Cl2N2O2, Aceclofenac Impurity 11 contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 393.31 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C20H22Cl2N2O2 |
| Molecular Weight | 393.31 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Aceclofenac Standards
- Aceclofenac Ethyl (EsterAceclofenac EP Impurity E) (CAS 139272-67-6)
- Aceclofenac tert-Butyl Ester (CAS 139272-68-7)
- Aceclofenac EP Impurity G (CAS 1215709-75-3)
- Aceclofenac Impurity 12 (CAS CATO-C4X-153112)
- Aceclofenac Impurity 17 (CAS CATO-C4X-153117)
- Aceclofenac Methyl Ester (Aceclofenac EP Impurity D) (CAS 139272-66-5)
- Aceclofenac 13C2 D4 (CAS 1795019-63-4)
- Aceclofenac Impurity 16 (CAS CATO-C4X-153116)
Recommended Standards
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- Minoxidil Impurity 15 (CAS CATO-C4X-170015)
- Tofacitinib Impurity 219 (CAS CATO-C4X-1079219)
- Lercanidipine Impurity 7 (CAS 100442-33-9)
- N-((3R,4R)-3-methoxytetrahydro-2H-pyran-4-yl)piperidin-4-amine dihydrochloride (CAS 1232063-16-9)
- N-isopentyl-2,2-dimethylthietan-3-amine (CAS 1855776-08-7)
- 4-(3-Allylthioureido)benzoic acid (CAS 1142-29-6)
- tert-butyl 4-(mercaptomethyl)piperidine-1-carboxylate (CAS 581060-27-7)
- 2-Cyanobenzyl acetate (CAS 38866-59-0)
- N,N-Dipropylformamide (CAS 6282-00-4)
- Hexapeptide-9 (CAS 885024-94-2)
Why CATO?
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