Dexamethasone Impurity 55 CAS CATO-C4X-116555
| CAS No. | CATO-C4X-116555 |
| Molecular Formula | C22H32FO7P |
| Molecular Weight | 458.46 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.
Dexamethasone Impurity 55 (CAS CATO-C4X-116555) is a certified pharmaceutical impurity reference standard with the molecular formula C22H32FO7P and a molecular weight of 458.46 g/mol.
Owing to a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system, Dexamethasone Impurity 55 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 458.46 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C22H32FO7P |
| Molecular Weight | 458.46 g/mol |
| Appearance | Off-white to pale 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) | 6.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
Related Dexamethasone Standards
- Dexamethasone impurity 66 (CAS CATO-C4X-116566)
- Dexamethasone Impurity 129 (CAS CATO-C4X-1165129)
- Dexamethasone Impurity 115 (CAS CATO-C4X-1165115)
- Dexamethasone Impurity 86 (CAS 2796254-05-0)
- Dexamethasone 17-Propionate (CAS 15423-89-9)
- Dexamethasone 21-Propionate (CAS 3793-10-0)
- Dexamethasone 21-Mesylate (CAS 2265-22-7)
- Dexamethasone Impurity 108 (CAS CATO-C4X-1165108)
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- 3-Fluoro-5-hydroxypicolinaldehyde (CAS 1227515-00-5)
- Potassium perfluorononanoate (CAS 21049-38-7)
- Tert-butyl 2-benzhydryl-2,6-diazaspiro[3.4]Octane-6-carboxylate (CAS 1250444-22-4)
- rac-benzyl N-[(1R,3S)-3-[(chlorosulfonyl)methyl]cyclopentyl]carbamate (CAS 1909293-75-9)
- (R)-N1,N2-dimethylpropane-1,2-diamine (CAS 39237-60-0)
- Semaglutide impurity 256 (CAS CATO-C4X-2226256)
Why CATO?
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