Fulvestrant EP Impurity B CAS CATO-C4X-191733
| CAS No. | CATO-C4X-191733 |
| Molecular Formula | C32H47F5O4S |
| Molecular Weight | 622.77 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Fulvestrant EP Impurity B 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.
As a process- or degradation-related impurity, Fulvestrant EP Impurity B (CAS CATO-C4X-191733, C32H47F5O4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Fulvestrant EP Impurity B (C32H47F5O4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, a polycyclic aromatic system. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C32H47F5O4S |
| Molecular Weight | 622.77 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Sulfur Atoms | 1 |
Related Fulvestrant Standards
- Fulvestrant EP Impurity B (CAS 98008-06-1)
- Fulvestrant 3-O-Methyl Impurity (CAS 1221256-46-7)
- Fulvestrant impurity 38 (CAS CATO-C4X-191738)
- Fulvestrant EP Impurity F (CAS CATO-C4X-19176)
- Fulvestrant impurity 55 (CAS CATO-C4X-191755)
- Fulvestrant Impurity 30 (CAS CATO-C4X-191730)
- Fulvestrant Impurity 60 (CAS 875573-69-6)
- Fulvestrant-d3 (CAS CATO-C4X-19177)
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