Fulvestrant impurity 51 CAS CATO-C4X-191751
| CAS No. | CATO-C4X-191751 |
| Molecular Formula | C31H47BrO3 |
| Molecular Weight | 547.61 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Fulvestrant impurity 51 (C31H47BrO3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 547.61 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
As a process- or degradation-related impurity, Fulvestrant impurity 51 (CAS CATO-C4X-191751, C31H47BrO3) 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.
CATO manufactures Fulvestrant impurity 51 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C31H47BrO3 |
| Molecular Weight | 547.61 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
Related Fulvestrant Standards
- Fulvestrant impurity 49 (CAS CATO-C4X-191749)
- Fulvestrant impurity 50 (CAS CATO-C4X-191750)
- Fulvestrant impurity 56 (CAS CATO-C4X-191756)
- Fulvestrant impurity 47 (CAS CATO-C4X-191747)
- Fulvestrant Impurity 16 (CAS CATO-C4X-191716)
- Fulvestrant Impurity 17 (CAS CATO-C4X-191717)
- Fulvestrant Impurity 18 (CAS CATO-C4X-191718)
- Fulvestrant Impurity 20 (CAS CATO-C4X-191720)
Recommended Standards
- Relugolix Impurity 27 (CAS CATO-C4X-242927)
- Atorvastatin Impurity 130 (CAS 1193817-52-5)
- Dabrafenib Impurity 15 (CAS CATO-C4X-303315)
- Palbociclib Impurity 89 (CAS 1974279-21-4)
- Docetaxel Impurity 23 (CAS 145514-62-1)
- Proparacaine Impurity 22 (CAS CATO-C4X-202722)
- Iomeprol Impurity 24 (CAS CATO-C4X-182024)
- tert-Butyl 2-(hydroxymethyl)-3,3-dimethylmorpholine-4-carboxylate (CAS 2091198-51-3)
- 2,4-Difluoro-3-(3,4,5-trifluorophenyl)-propiophenone (CAS 898778-62-6)
- 4-[5-(2,4-Dichlorophenyl)-1H-pyrazol-3-yl]-1-{[3-(trifluoromethyl)phenyl]methyl}piperidine (CAS 1025724-79-1)
- 2-Fluoro-5-trifluoromethylbenzeneboronic acid pinacol ester, >97% (CAS 1192045-31-0)
- Ethyl 2-{3-[(4-methoxyanilino)carbonyl]-2-pyridinyl}acetate (CAS 338392-14-6)
- 4-(chloromethyl)-5-(5-chlorothiophen-2-yl)-1,2-oxazole (CAS 430535-13-0)
- Semaglutide impurity 48 (CAS CATO-C4X-222648)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com