Fluocinolone Acetonide Impurity 33 CAS CATO-C4X-238133
| CAS No. | CATO-C4X-238133 |
| Molecular Formula | C25H29FO7 |
| Molecular Weight | 460.49 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 460.49 g/mol gives Fluocinolone Acetonide Impurity 33 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Fluocinolone Acetonide Impurity 33 (CAS CATO-C4X-238133) is a certified pharmaceutical impurity reference standard with the molecular formula C25H29FO7 and a molecular weight of 460.49 g/mol.
Based on its molecular formula C25H29FO7, Fluocinolone Acetonide Impurity 33 contains a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 460.49 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C25H29FO7 |
| Molecular Weight | 460.49 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
Related Fluocinolone Standards
- Fluocinolone Acetonide Impurity N3 (CAS 72498-89-6)
- Fluocinolone Acetonide Impurity 45 (CAS 39987-51-4)
- Fluocinolone Acetonide Impurity 44 (CAS 54605-01-5)
- Fluocinolone Acetonide-13C3 (CAS 1262192-25-5)
- Fluocinolone Acetonide EP Impurity A (CAS 106931-78-6)
- Fluocinolone Acetonide Impurity 31 (CAS 1178-54-7)
- Fluocinolone Acetonide Impurity 3 (CAS 4306-83-6)
- Fluocinolone Acetonide Impurity 40 (CAS CATO-C4X-238140)
Recommended Standards
- Cefamandole Impurity 29 (CAS CATO-C4X-122129)
- Relugolix Impurity 30 (CAS CATO-C4X-242930)
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- Z-D-Dap(Fmoc)-OH (CAS 185968-90-5)
- Avatrombopag Impurity 119 (CAS CATO-C4X-2234119)
- Bacitracin Impurity M (CAS CATO-C4X-155313)
- Cytarabine Impurity 27 (CAS CATO-C4X-200527)
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- 2,2,6-Trimethyl-2H-pyrano[3,2-c]quinolin-5(6H)-one (CAS 50333-13-6)
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- 7-Chloro-2h,3h-[1,4]dioxino[2,3-b]pyridine-6-carboxylic acid (CAS 877177-32-7)
- C-Peptide（dog） (CAS 39016-05-2)
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