Piracetam Impurity 18 CAS CATO-C4X-123518
| CAS No. | CATO-C4X-123518 |
| Molecular Formula | C6H9ClN2O2 |
| Molecular Weight | 176.60 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Piracetam Impurity 18 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.
As a process- or degradation-related impurity, Piracetam Impurity 18 (CAS CATO-C4X-123518, C6H9ClN2O2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C6H9ClN2O2, Piracetam Impurity 18 contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 176.60 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C6H9ClN2O2 |
| Molecular Weight | 176.60 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Piracetam Standards
- Piracetam Impurity N5 (CAS 2454698-45-2)
- Piracetam Impurity 17 (CAS 64026-51-3)
- Piracetam Impurity 23 (CAS CATO-C4X-123523)
- Piracetam Impurity 44 (CAS CATO-C4X-123544)
- Piracetam EP Impurity C (CAS 61516-73-2)
- Piracetam impurity 41 (CAS 87148-72-9)
- Piracetam Impurity 43 (CAS CATO-C4X-123543)
- Piracetam impurity 31 (CAS CATO-C4X-123531)
Recommended Standards
- 7-Chloro-1H-indole-5-carbonitrile (CAS 887593-92-2)
- 4-Chlorobenzenesulfinic acid (CAS 100-03-8)
- 6-Chloro-8-ethynylimidazo[1,5-a]pyridine (CAS 2767259-27-6)
- 4-Chloro-5-methylthiophene-2-carboxylic acid (CAS 123418-43-9)
- Cabozantinib Impurity 3 (CAS 1431468-36-8)
- Landiolol Impurity 85 (CAS CATO-C4X-262185)
- Naltrexone impurity 50 (CAS CATO-C4X-147550)
- 5,7-Dimethylbenzo[d]thiazol-2(3H)-one, 97% (CAS 1188044-77-0)
- (R)-1-[3,5-Bis(trifluoromethyl)phenyl]ethylamine (CAS 127733-47-5)
- 1-(4-Aminophenoxy)propan-2-ol (CAS 212835-42-2)
- 2-Acetamido-2-(4-fluorophenyl)aceticacid (CAS 153381-37-4)
- Ethyl 2-(difluoromethyl)-6-(3-fluorophenyl)nicotinate (CAS 1713589-66-2)
- 9-Borabicyclo[3.3.1]Nonan-9-yl trifluoromethanesulfonate (CAS 62731-43-5)
- [D-Glu]3-Semaglutide (CAS CATO-C4X-2226253)
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