Deflazacort Impurity 90 CAS CATO-C4X-202190
| CAS No. | CATO-C4X-202190 |
| Molecular Formula | C21H22BNO5 |
| Molecular Weight | 379.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Deflazacort Impurity 90 (CAS CATO-C4X-202190) is a certified pharmaceutical impurity reference standard with the molecular formula C21H22BNO5 and a molecular weight of 379.21 g/mol.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, Deflazacort Impurity 90 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 379.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C21H22BNO5 |
| Molecular Weight | 379.21 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | ≥95% |
| Storage | Store at 2-8°C, 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) | 11.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Deflazacort Standards
- Deflazacort Impurity 10 (CAS CATO-C4X-233610)
- Deflazacort Impurity 7 (CAS CATO-C4X-23367)
- Deflazacort Impurity 8 (CAS CATO-C4X-23368)
- Deflazacort Impurity 9 (CAS CATO-C4X-23369)
- Deflazacort Impurity 1 (CAS 13649-57-5)
- Deflazacort Impurity 2 (CAS CATO-C4X-23362)
- Deflazacort 6a-hydroxy-21-desacetyl (CAS 87539-45-5)
- Deflazacort 6b-hydroxy-21-desacetyl (CAS 72099-45-7)
Recommended Standards
- Crisaborole Impurity 144 (CAS CATO-C4X-2021144)
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- 3-((3,5-Dichlorophenyl)sulfonyl)-6-isocyanoquinolin-4(1H)-one (CAS 1019153-09-3)
- Linaprazan Impurity 14 (CAS CATO-C4X-348614)
- Delamanid Impurity 5 (CAS 1194254-67-5)
- Vonoprazan Fumarate Impurity 56 (CAS 445-27-2)
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- 1-Ethyl-pyrrolidine-3-thiol (CAS 3608-72-8)
- 3-Bromo-4-isopropoxybenzohydrazide (CAS 1706461-66-6)
- Carbetocin Impurity 38 (CAS CATO-C4X-191138)
- Ethyl 3-(4-methyl-1H-pyrazol-1-yl)propanoate (CAS 1159697-46-7)
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