Felodipine EP Impurity C CAS 79925-38-5
| CAS No. | 79925-38-5 |
| Molecular Formula | C19H21Cl2NO4 |
| Molecular Weight | 398.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 398.28 g/mol gives Felodipine EP Impurity C distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Felodipine EP Impurity C (CAS 79925-38-5), a pharmacopoeial impurity reference standard (molecular formula C19H21Cl2NO4, MW 398.28 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Felodipine EP Impurity C (C19H21Cl2NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 398.28 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
As a certified reference material (CRM), Felodipine 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 | C19H21Cl2NO4 |
| Molecular Weight | 398.28 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 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Felodipine Standards
Recommended Standards
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- 4,4,4-Trifluoro-2-(4-fluoro-phenyl)-3-oxo-butyronitrile hydrate (CAS 2331260-23-0)
- Semaglutide impurity 204 (CAS CATO-C4X-2226204)
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