Fulvestrant Impurity 17 CAS CATO-C4X-191717
| CAS No. | CATO-C4X-191717 |
| Molecular Formula | C35H60O4Si |
| Molecular Weight | 572.93 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 572.93 g/mol gives Fulvestrant Impurity 17 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Fulvestrant Impurity 17 (CAS CATO-C4X-191717, C35H60O4Si) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Fulvestrant Impurity 17 (C35H60O4Si) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 17 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 | C35H60O4Si |
| Molecular Weight | 572.93 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Fulvestrant Standards
- Fulvestrant Impurity 16 (CAS CATO-C4X-191716)
- Fulvestrant impurity 37 (CAS CATO-C4X-191737)
- Fulvestrant impurity 45 (CAS CATO-C4X-191745)
- Fulvestrant impurity 58 (CAS CATO-C4X-191758)
- Fulvestrant Impurity 31 (CAS CATO-C4X-191731)
- Fulvestrant impurity 49 (CAS CATO-C4X-191749)
- Fulvestrant impurity 50 (CAS CATO-C4X-191750)
- Fulvestrant impurity 51 (CAS CATO-C4X-191751)
Recommended Standards
- Dodecane-1,12-diylbis(tributylphosphonium) bromide (CAS 99372-74-4)
- Iridiumtriiodide (CAS 7790-41-2)
- C18 Ceramide-d7(d18:1-d7/18:0) (CAS 1840942-14-4)
- 2,6-Bis(4-octylphenyl)dithieno[3,2-b:2',3'-d]thiophene (CAS 1429377-95-6)
- Dapoxetine Impurity 49 (CAS 157166-71-7)
- Adefovir Impurity 5 (CAS 116384-53-3)
- Raltegravir EP Impurity B (CAS 1193687-85-2)
- N-(2-Chloro-4,6-dimethylphenyl)-2-((3-ethyl-5,6-dimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidin-2-yl)thio)acetamide (CAS 579446-87-0)
- 2-Pyridinebutanoic acid, α-[[(1,1-dimethylethoxy)carbonyl]amino]-, (αR)- (CAS 1240588-59-3)
- (3,4-Difluorophenyl)(m-tolyl)methanol (CAS 842140-74-3)
- 4-(2-Ethoxyphenyl)butan-1-amine (CAS 1017337-90-4)
- 4-Amino-2-(propan-2-yloxy)benzoic acid (CAS 2486-78-4)
- (4-(Benzo[d]thiazol-2-yl)piperazin-1-yl)(1-ethyl-1H-pyrazol-5-yl)methanone (CAS 1172471-75-8)
- Semaglutide Impurity 149 (CAS CATO-C4X-2226149)
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