Spironolactone Impurity 13 CAS CATO-C4X-134513
| CAS No. | CATO-C4X-134513 |
| Molecular Formula | C20H26O2 |
| Molecular Weight | 298.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Spironolactone Impurity 13 (CAS CATO-C4X-134513), a pharmacopoeial impurity reference standard (molecular formula C20H26O2, MW 298.42 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C20H26O2, Spironolactone Impurity 13 contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 298.42 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.
As a certified reference material (CRM), Spironolactone Impurity 13 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 | C20H26O2 |
| Molecular Weight | 298.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Spironolactone Standards
- Spironolactone EP Impurity H (CAS 53866-24-3)
- Spironolactone Gammalactone Impurity (CAS 20802-57-7)
- Spironolactone Impurity 10 (CAS 53866-23-2)
- Spironolactone Impurity 17 (CAS CATO-C4X-134517)
- Spironolactone Impurity 16 (CAS CATO-C4X-134516)
- Spironolactone EP Impurity F (CAS 976-71-6)
- Spironolactone EP Impurity C (CAS 976-70-5)
- Spironolactone Impurity 19 (CAS CATO-C4X-134519)
Recommended Standards
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- Diphenhydramine impurity 18 (CAS 150556-79-9)
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- 1-(4-Beta-Hydroxyethylsulfonylphenyl-)-3-methyl-5-pyrazolone (CAS 21951-34-8)
- Palmitoyl Pentapeptide-4 (CAS 214047-00-4)
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