Dydrogesterone Impurity 23 CAS CATO-C4X-218323
| CAS No. | CATO-C4X-218323 |
| Molecular Formula | C21H28O2 |
| Molecular Weight | 312.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Dydrogesterone Impurity 23 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, Dydrogesterone Impurity 23 (CAS CATO-C4X-218323, C21H28O2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Dydrogesterone Impurity 23 (C21H28O2) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 312.45 g/mol, it falls into the moderately-high-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C21H28O2 |
| Molecular Weight | 312.45 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 Dydrogesterone Standards
- Dydrogesterone Impurity 12; (CAS 17398-60-6)
- Dydrogesterone (CAS 152-62-5)
- Dydrogesterone EP Impurity C (CAS 246038-13-1)
- Dydrogesterone EP Impurity B (CAS CATO-C4X-218313)
- Dydrogesterone Impurity 8 (CAS CATO-C4X-21838)
- Dydrogesterone Impurity N3 (CAS 25093-47-4)
- Dydrogesterone Impurity 1 (CAS 1819-14-3)
- Dydrogesterone Impurity 4 (CAS 4243-74-7)
Recommended Standards
- Promestriene Impurity 12 (CAS CATO-C4X-220512)
- Promestriene Impurity 7 (CAS 1852-86-4)
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- Neostigmine impurity 39 (CAS CATO-C4X-204239)
- Lenalidomide Impurity 40 (CAS CATO-C4X-190340)
- Zolmitriptan Impurity 35 (Mixture of Diastereomers) (CAS CATO-C4X-135135)
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- 4-((4-Fluoro-2-methyl-1H-indol-5-yl)oxy)-5-methylpyrrolo[2,1-f][1,2,4]triazin-6-yl pivalate (CAS 952490-01-6)
- 6-Chloro-4-fluoropyridine-2-sulfonyl chloride (CAS 1393582-24-5)
- Ertugliflozin Impurity 48 (CAS CATO-C4X-301148)
- Galanin (1-13)-Neuropeptide Y (25-36) amide (CAS 147138-51-0)
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