Dexamethasone impurity 79 CAS CATO-C4X-116579
| CAS No. | CATO-C4X-116579 |
| Molecular Formula | C23H29FO6 |
| Molecular Weight | 420.47 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Dexamethasone impurity 79 (CAS CATO-C4X-116579, C23H29FO6) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution, Dexamethasone impurity 79 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 420.47 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.
As a certified reference material (CRM), Dexamethasone impurity 79 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 | C23H29FO6 |
| Molecular Weight | 420.47 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
Related Dexamethasone Standards
- Dexamethasone Acetate EP Impurity G (CAS 1597-78-0)
- Dexamethasone Acetate EP Impurity F (CAS 2884-51-7)
- Dexamethasone Impurity 112 (CAS 134429-26-8)
- Dexamethasone Impurity 24 (CAS 55879-47-5)
- Dexamethasone Impurity 97 (CAS CATO-C4X-116597)
- Dexamethasone Acid Ethyl Ester (CAS 2991360-83-7)
- Dexamethasone Impurity N1 (CAS 37926-77-5)
- Dexamethasone EP Impurity B Disodium Salt (CAS 7460-03-9)
Recommended Standards
- Decitabine Impurity 48 (CAS CATO-C4X-113748)
- Triamcinolone Impurity 10 (CAS 3800-28-0)
- Linagliptin Impurity 89 (CAS CATO-C4X-110189)
- Betamethasone Impurity 116 (CAS CATO-C4X-1437116)
- Terbutaline impurity 128 (CAS CATO-C4X-1183128)
- Brexpiprazole Impurity 154 (CAS 2514958-62-2)
- Fexofenadine Impurity 33 (CAS CATO-C4X-179433)
- Butyl[(2-methoxyphenyl)methyl]amine hydrochloride (CAS 1158579-56-6)
- 1-(2-Methylbenzyl)-1H-1,2,3-triazole-4-carbaldehyde (CAS 1497456-40-2)
- 1-(3,5-Bis(perfluorobutyl)-1H-pyrazol-1-yl)ethan-1-one (CAS 247170-28-1)
- 1-(allyloxy)-2-(trifluoromethoxy)benzene (CAS 276697-76-8)
- 3-(2,2,2-Trifluoroethyl)isoxazole-4-carboxylic acid (CAS 1779905-44-0)
- 4-(4-Methoxy-3,5-Dimethylphenyl)-1,3-Thiazole-2-Carboxylic Acid (CAS 952958-61-1)
- Semaglutide impurity 249 (CAS CATO-C4X-2226249)
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