Fulvestrant impurity 43 CAS CATO-C4X-191743
| CAS No. | CATO-C4X-191743 |
| Molecular Formula | C32H46BrF5O3S |
| Molecular Weight | 685.67 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.
As a process- or degradation-related impurity, Fulvestrant impurity 43 (CAS CATO-C4X-191743, C32H46BrF5O3S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C32H46BrF5O3S, Fulvestrant impurity 43 contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/bromine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 685.67 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).
CATO manufactures Fulvestrant impurity 43 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 | C32H46BrF5O3S |
| Molecular Weight | 685.67 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/Br-containing |
| Sulfur Atoms | 1 |
Related Fulvestrant Standards
- Fulvestrant Impurity 12 (CAS CATO-C4X-191712)
- Fulvestrant Impurity 13 (CAS CATO-C4X-191713)
- Fulvestrant impurity 42 (CAS CATO-C4X-191742)
- Fulvestrant impurity 52 (CAS CATO-C4X-191752)
- Fulvestrant impurity 35 (CAS CATO-C4X-191735)
- Fulvestrant EP Impurity D (CAS 2483797-59-5)
- Fulvestrant impurity 54 (CAS CATO-C4X-191754)
- Fulvestrant Impurity 21 (CAS 261506-24-5)
Recommended Standards
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- Nifuratel Impurity 19 (CAS CATO-C4X-127219)
- Mitiglinide Impurity 7 (CAS 21307-97-1)
- Tafluprost Impurity 9 (CAS 1563176-58-8)
- 5-(Methylsulfonyl)-4-(o-tolyl)thiazol-2-amine (CAS 1713714-42-1)
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- CAS 67889-40-1 (CAS 67889-40-1)
- 2-(2,4-Dichlorophenyl)azepane hydrochloride (CAS 1177343-42-8)
- 1-(2,4-Dimethylphenyl)-3-(p-tolyl)propan-1-one (CAS 898768-79-1)
- 1-(6-Chloro-2-pyridinyl)azepane (CAS 1220038-80-1)
- Pancreatic Polypeptide (31-36), amide, human (CAS 74012-13-8)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com