Budesonide Impurity 78 CAS CATO-C4X-138978
| CAS No. | CATO-C4X-138978 |
| Molecular Formula | C27H38O8 |
| Molecular Weight | 490.59 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Budesonide Impurity 78 (CAS CATO-C4X-138978) is a certified pharmaceutical impurity reference standard with the molecular formula C27H38O8 and a molecular weight of 490.59 g/mol.
Structurally, Budesonide Impurity 78 (C27H38O8) contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 490.59 g/mol, it falls into the moderately-high-molecular-weight range. 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).
As a certified reference material (CRM), Budesonide Impurity 78 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 | C27H38O8 |
| Molecular Weight | 490.59 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Budesonide Standards
- Budesonide Impurity 67 (CAS CATO-C4X-138967)
- Budesonide impurity 43 (CAS CATO-C4X-138943)
- Budesonide Impurity 51 (CAS CATO-C4X-138951)
- Budesonide Impurity 62 (CAS CATO-C4X-138962)
- Budesonide Impurity 69 (CAS CATO-C4X-138969)
- Budesonide Impurity 40 (CAS 91160-89-3)
- Budesonide Impurity 72 (CAS CATO-C4X-138972)
- Budesonide Impurity 53 (CAS CATO-C4X-138953)
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