Fluorometholone Impurity 11 CAS CATO-C4X-193311
| CAS No. | CATO-C4X-193311 |
| Molecular Formula | C26H33FO6 |
| Molecular Weight | 460.54 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.
Fluorometholone Impurity 11 (CAS CATO-C4X-193311) is a certified pharmaceutical impurity reference standard with the molecular formula C26H33FO6 and a molecular weight of 460.54 g/mol.
Structurally, Fluorometholone Impurity 11 (C26H33FO6) contains a steroid core, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 460.54 g/mol, it falls into the moderately-high-molecular-weight range. 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 | C26H33FO6 |
| Molecular Weight | 460.54 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
Related Fluorometholone Standards
- Fluorometholone Impurity 7 (CAS 2796-99-8)
- Fluorometholone Impurity 6 (CAS 110664-58-9)
- Fluorometholone Acetate (CAS 3801-06-7)
- Fluorometholone Epoxy Analog (CAS 83873-17-0)
- Fluorometholone Impurity N12 (CAS 382-52-5)
- Fluorometholone Impurity 8 (CAS CATO-C4X-19338)
- Fluorometholone Impurity 2 (CAS 130145-14-1)
- Fluorometholone Acetate 6,9(11)-diene Impurity (CAS 95955-20-7)
Recommended Standards
- Promethazine N-β-D-Glucuronide (CAS 137908-81-7)
- 2-((5-((4-Methoxyphenoxy)methyl)-4-phenyl-4H-1,2,4-triazol-3-yl)thio)-N-(o-tolyl)acetamide (CAS 332912-70-6)
- 55646-99-6 (4a'S,4b'R,5'S,6a'S,6b'S,9a'R,10a'S,10b'S)-4b'-Fluoro-5'-hydroxy-6b'-(hydroxyacetyl)-4a',6a'-dimethyl-4a',4b',5',6',6a',6b',9a',10',10a',10b',11',12'-dodecahydro-2'H-spiro[cyclopentane-1,8'-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol]-2'-one DTXSID20747501 (CAS 55646-99-6)
- 2-((5-((4-Methoxyphenoxy)methyl)-4-phenyl-4H-1,2,4-triazol-3-yl)thio)-N-(p-tolyl)acetamide (CAS 332907-39-8)
- Itraconazole EP Impurity B (CAS 854372-77-3)
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- Trimethylsilyl Acrylate (stabilized with BHT) (CAS 13688-55-6)
- 1,3-Dimethyl-4-phenoxy-1H-pyrazolo[3,4-b]quinoline (CAS 100743-05-3)
- 3-Hydroxy-2-methylpentanoic acid (CAS 28892-73-1)
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- Ranitidine-d6 HCl (CAS 1185238-09-8)
- Semaglutide impurity 233 (CAS CATO-C4X-2226233)
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