Methylprednisolone impurity 83 CAS CATO-C4X-191983
| CAS No. | CATO-C4X-191983 |
| Molecular Formula | C26H32O7 |
| Molecular Weight | 456.53 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Methylprednisolone impurity 83 (CAS CATO-C4X-191983, C26H32O7) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C26H32O7, Methylprednisolone impurity 83 contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 456.53 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).
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), Methylprednisolone impurity 83 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 | C26H32O7 |
| Molecular Weight | 456.53 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 |
Related Methylprednisolone Standards
- Methylprednisolone Impurity 53 (CAS CATO-C4X-191953)
- Methylprednisolone Impurity 68 (CAS 86413-24-3)
- Methylprednisolone Impurity 91 (CAS 124106-96-3)
- Methylprednisolone impurity 97 (CAS CATO-C4X-191997)
- Methylprednisolone Hydrogen Succinate EP Impurity E (CAS 2920-86-7)
- Methylprednisolone Impurity 63 (CAS 7415-42-1)
- Methylprednisolone Impurity 73 (CAS CATO-C4X-191973)
- Methylprednisolone impurity 85 (CAS CATO-C4X-191985)
Recommended Standards
- Triamcinolone Acetonide Impurity 48 (CAS 1418196-53-8)
- Lemborexant Impurity 106 (CAS CATO-C4X-3042106)
- Desonide Impurity 11 (CAS 25092-32-4)
- Lemborexant Impurity 107 (CAS CATO-C4X-3042107)
- Olanzapine EP Impurity A (CAS 138564-59-7)
- Lemborexant Impurity 85 (CAS CATO-C4X-304285)
- LCZ-696 Impurity 59 (CAS CATO-C4X-169659)
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- 2-(1-Hydroxyethyl)benzofuran (CAS 99058-80-7)
- (S)-3-Ethyl-2-oxooxazolidine-4-carbaldehyde (CAS 131675-63-3)
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- 5-[(3,4-dimethylphenyl)methyl]-1,3-thiazol-2-amine hydrochloride (CAS 1171575-96-4)
- Acetyl decapeptide-3 (CAS 935288-50-9)
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