Deflazacort Impurity 1 CAS 13649-57-5
| CAS No. | 13649-57-5 |
| Molecular Formula | C23H29NO5 |
| Molecular Weight | 399.48 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 399.48 g/mol gives Deflazacort Impurity 1 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Deflazacort Impurity 1 (CAS 13649-57-5) is a certified pharmaceutical impurity reference standard with the molecular formula C23H29NO5 and a molecular weight of 399.48 g/mol.
The molecular framework of Deflazacort Impurity 1 (C23H29NO5) is characterized by a flavonoid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C23H29NO5 |
| Molecular Weight | 399.48 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
| 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 2 (CAS CATO-C4X-23362)
- Deflazacort 6a-hydroxy-21-desacetyl (CAS 87539-45-5)
- Deflazacort 6b-hydroxy-21-desacetyl (CAS 72099-45-7)
- Deflazacort Impurity 90 (CAS CATO-C4X-202190)
Recommended Standards
- Nitroso Perindopril EP impurity N (CAS CATO-C4X-125251)
- Alectinib impurity 21 (CAS 1256584-91-4)
- Emtricitabine Impurity 57 (CAS 1773498-61-5)
- Nemonoxacin Impurity 83 (CAS CATO-C4X-312883)
- Amorolfine Impurity 56 (CAS CATO-C4X-154256)
- Pyrimethamine Impurity 4 (CAS CATO-C4X-20444)
- Hydrocortisone Impurity 66 (CAS CATO-C4X-140166)
- 6-Ethoxy-N-phenylpyrimidin-4-amine (CAS 88614-09-9)
- 3-((1-(3-Fluoro-4-methoxyphenyl)ethyl)amino)propanamide (CAS 1090649-71-0)
- (R)-3-Amino-1-(4-fluorophenyl)propan-1-ol (CAS 858130-48-0)
- Ethyl 1-benzyl-4-hydroxy-7-methyl-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxylate (CAS 76336-03-3)
- Tert-butyl (S)-((4-acetylmorpholin-2-yl)methyl)carbamate (CAS 2381763-31-9)
- 1,1,1-Trifluoro-4-phenylbut-3-yn-2-one (CAS 58518-08-4)
- Neuropeptide S (human) (CAS 412938-67-1)
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