Clopidogrel Hydrogen Sulfate EP Impurity C CAS 120202-71-3
| CAS No. | 120202-71-3 |
| Molecular Formula | C16H16ClNO2S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Clopidogrel Hydrogen Sulfate EP Impurity C (CAS 120202-71-3) is a certified pharmaceutical impurity reference standard with the molecular formula C16H16ClNO2SH2O4S and a molecular weight of 419.89 g/mol.
Based on its molecular formula C16H16ClNO2SH2O4S, Clopidogrel Hydrogen Sulfate EP Impurity C contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 419.89 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a certified reference material (CRM), Clopidogrel Hydrogen Sulfate EP Impurity C 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.
Physical & Chemical Properties
| Molecular Formula | C16H16ClNO2S H2O4S |
| Molecular Weight | 419.89 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Clopidogrel Standards
- Clopidogrel Impurity 74 (CAS 1008008-56-7)
- Clopidogrel Impurity 82 (CAS 1015247-87-6)
- rac-Clopidogrel EP Impurity A HCl (CAS 1015247-88-7)
- rac Clopidogrel [(tert-Butylcarbonyl)oxy]methyl ester (CAS 1043913-82-1)
- 2-Oxo Clopidogrel (Mixture of Diastereomers) (CAS 109904-27-0)
- Clopidogrel Impurity 42 (CAS 109904-36-1)
- cis-Clopidogrel glutathione disulfide, mixture of diastereomers (CAS 1118605-95-0)
- Clopidogrel Impurity 48 (CAS 111954-31-5)
Recommended Standards
- Avibactam impurity 95 (CAS CATO-C4X-134895)
- Levocetirizine Impurity 64 (CAS CATO-C4X-108364)
- Metaraminol Impurity 15 (CAS 13103-80-5)
- 2-Amino-2-[4-(trifluoromethoxy)phenyl]acetonitrile hydrochloride (CAS 1375474-19-3)
- [3-(3-Methoxy-phenyl)-isoxazol-5-yl]-methanol (CAS 954240-10-9)
- 5-((4-Chloro-1h-pyrazol-1-yl)methyl)furan-2-carbohydrazide (CAS 381169-19-3)
- 4-((2-Methylallyl)oxy)benzoic acid (CAS 68564-43-2)
- [(3-Phenoxyphenyl)methyl](prop-2-en-1-yl)amine hydrochloride (CAS 1240581-95-6)
- 2-Bromo-4-((3,3-difluoroazetidin-1-yl)methyl)pyridine (CAS 1459772-15-6)
- Crustacean Cardioactive Peptide (CCAP) (CAS 309247-84-5)
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