Eplerenone Impurity 43 CAS CATO-C4X-163043
| CAS No. | CATO-C4X-163043 |
| Molecular Formula | C24H29NO5 |
| Molecular Weight | 411.49 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Eplerenone Impurity 43 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 Eplerenone Impurity 43 (CAS CATO-C4X-163043), a pharmacopoeial impurity reference standard (molecular formula C24H29NO5, MW 411.49 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Eplerenone Impurity 43 (C24H29NO5) is characterized by a flavonoid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
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 | C24H29NO5 |
| Molecular Weight | 411.49 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Eplerenone Standards
- Eplerenone 395665-48-2 (CAS 395665-48-2)
- Eplerenone EP Impurity B (CAS 192704-82-8)
- Eplerenone Impurity 26 (CAS CATO-C4X-163026)
- Eplerenone USP RC F (CAS CATO-C4X-163030)
- Eplerenone Impurity 40 (CAS CATO-C4X-163040)
- Eplerenone Impurity 41 (CAS CATO-C4X-163041)
- Eplerenone Impurity 45 (CAS CATO-C4X-163045)
- Eplerenone EP Impurity E (CAS 209253-81-6)
Recommended Standards
- Nitroso Perindopril EP impurity E (CAS CATO-C4X-125247)
- LCZ-696 Impurity 15 (CAS 149709-49-9)
- Rosuvastatin Impurity 168 (CAS CATO-C4X-1169168)
- LCZ-696 Impurity 3 (CAS 149709-62-6)
- Tolvaptan impurity 112 (CAS CATO-C4X-1955112)
- Gadodiamide Impurity 11 (CAS CATO-C4X-314311)
- Cefoxitin Impurity 46 (CAS CATO-C4X-157846)
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Why CATO?
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