Fulvestrant impurity 40 CAS CATO-C4X-191740
| CAS No. | CATO-C4X-191740 |
| Molecular Formula | C29H41BrO3 |
| Molecular Weight | 517.54 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C29H41BrO3, Fulvestrant impurity 40 contains a steroid core, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 517.54 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).
As a process- or degradation-related impurity, Fulvestrant impurity 40 (CAS CATO-C4X-191740, C29H41BrO3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
As a certified reference material (CRM), Fulvestrant impurity 40 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 | C29H41BrO3 |
| Molecular Weight | 517.54 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 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
Related Fulvestrant Standards
- Fulvestrant impurity 46 (CAS CATO-C4X-191746)
- Fulvestrant Impurity 20 (CAS CATO-C4X-191720)
- Fulvestrant impurity 39 (CAS CATO-C4X-191739)
- Fulvestrant Impurity 18 (CAS CATO-C4X-191718)
- Fulvestrant impurity 47 (CAS CATO-C4X-191747)
- Fulvestrant impurity 49 (CAS CATO-C4X-191749)
- Fulvestrant impurity 50 (CAS CATO-C4X-191750)
- Fulvestrant impurity 51 (CAS CATO-C4X-191751)
Recommended Standards
- ML364 (CAS 1991986-30-1)
- (1-(tert-butoxycarbonyl)-5-((4-(2-((tert-butyldimethylsilyl)oxy)ethyl)piperazin-1-yl)methyl)-1H-indol-2-yl)boronic acid (CAS 913388-70-2)
- Boceprevir Impurity 9 (CAS CATO-C4X-25259)
- (E)-Methyl 2-amino-5-(2-(cyanoimino)-1-(6-(2-cyanopropan-2-yl)pyridin-3-yl)-3-methyl-2,3-dihydro-1H-imidazo[4,5-c]quinolin-8-yl)nicotinate (CAS 1356035-43-2)
- Mabuterol Impurity 9 (CAS CATO-C4X-14549)
- Exemestane EP Impurity J (CAS 1160599-91-6)
- Ceftazidime Impurity 54 (CAS CATO-C4X-121254)
- 4-(2-Methyl-5-nitrobenzenesulfonamido)benzoic acid (CAS 114500-26-4)
- 3-((6-Phenylthieno[2,3-d]pyrimidin-4-yl)amino)benzoic acid hydrochloride (CAS 474376-43-7)
- 1-Methyl-1H-imidazole-2-carboximidamide hydrochloride (CAS 849600-64-2)
- 9-Cyclobutyl-9H-purin-6-amine (CAS 132406-73-6)
- Clomipramine N-Oxide (CAS 14171-67-6)
- (2,2,2-Tribromoethyl)benzene (CAS 72591-21-0)
- Peptide 436 (CAS CATO-CPTD788436)
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