Difluprednate Impurity 1 CAS CATO-C4X-21781
| CAS No. | CATO-C4X-21781 |
| Molecular Formula | C25H32F2O6 |
| Molecular Weight | 466.51 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Difluprednate Impurity 1 (CAS CATO-C4X-21781) is a certified pharmaceutical impurity reference standard with the molecular formula C25H32F2O6 and a molecular weight of 466.51 g/mol.
The molecular framework of Difluprednate Impurity 1 (C25H32F2O6) is characterized by a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C25H32F2O6 |
| Molecular Weight | 466.51 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| 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 Difluprednate Standards
- Difluprednate Impurity N1 (CAS 23640-96-2)
- Difluprednate Impurity 4 (CAS 1296262-60-6)
- Difluprednate (CAS 23674-86-4)
- Difluprednate Impurity N2 (CAS 2326-26-3)
- Difluprednate Impurity 3 (CAS 1234557-20-0)
- Difluprednate Impurity 2 (CAS 2285-44-1)
- Difluprednate Impurity 5 (CAS 1270039-29-6)
- Difluprednate Impurity 6 (CAS 167997-12-8)
Recommended Standards
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- Diflorasone impurity 6 (CAS CATO-C4X-24806)
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- Fluticasone Impurity N13 (CAS 59860-80-9)
- Tiotropium Impurity 26 (CAS 10299-90-8)
- Famciclovir Impurity 5 (CAS CATO-C4X-16425)
- Sitagliptin Impurity 94 (CAS 881995-70-6)
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- 4-(4-Ethylphenoxy)benzaldehyde (CAS 61343-85-9)
- Methyl 1'-benzyl-2-oxospiro[indoline-3,2'-pyrrolidine]-4'-carboxylate (CAS 1261079-75-7)
- 2-Methyl-5-nitro-1-benzofuran (CAS 14146-09-9)
- 4-Chloro-6-ethoxyquinoline-3-carboxylic acid ethyl ester (CAS 112190-03-1)
- N-(4-acetylphenyl)cyclobutanecarboxamide (CAS 423745-44-2)
- Tirzepatide Impurity 11 TFA salt (CAS CATO-C4X-324011)
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