Fenbufen Impurity 5 CAS CATO-C4X-19395
| CAS No. | CATO-C4X-19395 |
| Molecular Formula | C19H20O3 |
| Molecular Weight | 296.36 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Fenbufen Impurity 5 is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
As a process- or degradation-related impurity, Fenbufen Impurity 5 (CAS CATO-C4X-19395, C19H20O3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C19H20O3, Fenbufen Impurity 5 contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 296.36 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), Fenbufen Impurity 5 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C19H20O3 |
| Molecular Weight | 296.36 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| 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 |
Related Fenbufen Standards
- Fenbufen Ethyl Ester (CAS 1230-54-2)
- Fenbufen EP Impurity D (CAS CATO-C4X-19393)
- Fenbufen Methyl Ester (CAS 54011-27-7)
- Fenbufen-d9 (CAS 1189940-96-2)
- Fenbufen (CAS 36330-85-5)
- Fenbufen Impurity 2 (Fenbufen EP Impurity B) (CAS 34682-12-7)
- Fenbufen EP Impurity B (CAS CATO-C4X-19392)
- Fenbufen Impurity 6 (CAS 6918-68-9)
Recommended Standards
- N-Nitroso Fexofenadine EP Impurity E (CAS 1038-06-8)
- N-Nitroso Ebastine EP Impurity C (CAS CATO-C4X-202923)
- Ketoprofen EP Impurity L (Mixture of Enantiomer) (CAS 1797984-80-5)
- Revefenacin impurity 110 (CAS CATO-C4X-2031110)
- Labetalol Impurity 21 (CAS 33254-88-5)
- Amorolfine impurity 72 (CAS 59229-60-6)
- Plerixafor Impurity 45 DiHCl (CAS 117152-73-5 (free base))
- Eldecalcitol Impurity 61 (CAS CATO-C4X-214061)
- 7-methoxybenzofuran-2-boronyc acid (CAS 1094417-81-8)
- 5-(4-Chlorophenyl)-1-phenyl-1H-pyrazole (CAS 33064-23-2)
- 4-((2-Oxoindolin-3-yl)methyl)benzoic acid (CAS 1707571-73-0)
- 1-chloranyl-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-hexadecakis(fluoranyl)-8-iodanyl-octane 1-chloro-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-hexadecafluoro-8-iodooctane 16486-98-9 A810599 (CAS 16486-98-9)
- 1-(2-Chloro-5-ethoxy-4-fluorophenyl)-3-(trifluoromethyl)-1H-pyrazole (CAS 106081-80-5)
- Semaglutide impurity 51 (CAS CATO-C4X-222651)
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