Methylprednisolone Impurity 1 CAS CATO-C4X-19191
| CAS No. | CATO-C4X-19191 |
| Molecular Formula | C26H32O8 |
| Molecular Weight | 472.53 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Methylprednisolone Impurity 1.
Methylprednisolone Impurity 1 (CAS CATO-C4X-19191) is a certified pharmaceutical impurity reference standard with the molecular formula C26H32O8 and a molecular weight of 472.53 g/mol.
Based on its molecular formula C26H32O8, Methylprednisolone Impurity 1 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 472.53 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), Methylprednisolone Impurity 1 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 | C26H32O8 |
| Molecular Weight | 472.53 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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 78 (CAS CATO-C4X-191978)
- Methylprednisolone Impurity 49 (CAS CATO-C4X-191949)
- Methylprednisolone Hydrogen Succinate EP Impurity F (CAS 2376134-25-5)
- Methylprednisolone Hydrogen Succinate EP Impurity B (CAS 77074-42-1)
- Methylprednisolone Impurity 3 (CAS CATO-C4X-19193)
- Methylprednisolone 21-Hemisuccinate (Methylprednisolone Hydrogen Succinate) (CAS 2921-57-5)
- Methylprednisolone impurity 96 (CAS 103302-98-3)
- Methylprednisolone Impurity 52 (CAS CATO-C4X-191952)
Recommended Standards
- 989-61-7 11H,13H-Oxireno(d)pyrano(4',3':3,3a)isobenzofuro(5,4-f)(2)benzopyran-6,13(5aalphaH)-dione, 8alpha-(3-furyl)-2,2aalpha,3,4,4a,8,8a,9,10,10aalpha,14,14aalpha-dodecahydro-4alpha-hydroxy-2,2,4,4abeta,8,8aalpha-tetramethyl- 8alpha-(3-furyl)-2,2aalpha,3,4,4a,8,8a,9,10,10aalpha,14,14aalpha-dodecahydro-4alpha-hydroxy-2,2,4,4abeta,8,8aalpha-tetramethyl-11H,13H-oxireno(d)pyrano(4',3':3,3a)isobenzofuro(5,4-f)(2)benzopyran-6,13(5aalphaH)-dione Liminol (CAS 989-61-7)
- Thalidomide-NH-C6-NH-Boc (CAS 2093536-13-9)
- Laninamivir octanoate (CAS 203120-46-1)
- Methyl 1-benzyl-4-(4-(benzyloxy)-3-methoxyphenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate (CAS 385399-08-6)
- Ensifentrine impurity 32 (CAS CATO-C4X-335332)
- Argatroban Impurity 30 (CAS 153886-69-2)
- Estetrol Impurity 9 (CAS 3088028-01-4)
- 2-Amino-N-(3-hydroxybutyl)-3-phenylpropanamidehydrochloride (CAS 1236256-43-1)
- 3-[(3-Methyl-4-nitrophenoxy)methyl]piperidinehydrochloride (CAS 1185301-01-2)
- (2-(Sec-butyl)-6-(piperidin-3-yl)pyridin-4-yl)boronic acid (CAS 2225152-73-6)
- β-D-Glucopyranose, 4,6-O-(phenylmethylene)-, triacetate (CAS 60618-81-7)
- (4-Ethyl-3-(1-methyl-1h-pyrazol-4-yl)morpholin-2-yl)methanamine (CAS 1342577-16-5)
- 2-Bromo-4-(difluoromethyl)-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine (CAS 1806209-17-5)
- [Formaldehyde Schiff-base]-Semaglutide Impurity 136 X TFA Salt (CAS CATO-C4X-2226136)
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