Fulvestrant impurity 53 CAS CATO-C4X-191753
| CAS No. | CATO-C4X-191753 |
| Molecular Formula | C32H45F5O3S |
| Molecular Weight | 604.75 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 604.75 g/mol gives Fulvestrant impurity 53 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Fulvestrant impurity 53 (CAS CATO-C4X-191753) is a certified pharmaceutical impurity reference standard with the molecular formula C32H45F5O3S and a molecular weight of 604.75 g/mol.
Fulvestrant impurity 53 (C32H45F5O3S) 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C32H45F5O3S |
| Molecular Weight | 604.75 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Sulfur Atoms | 1 |
Related Fulvestrant Standards
- Fulvestrant impurity 36 (CAS CATO-C4X-191736)
- Fulvestrant EP Impurity E (CAS 2170200-14-1)
- Fulvestrant (CAS 129453-61-8)
- Fulvestrant EP Impurity A (CAS 407577-53-1)
- Fulvestrant S Enantiomer (CAS 1316849-17-8)
- Fulvestrant R Enantiomer (CAS 1807900-80-6)
- Fulvestrant impurity 32 (CAS CATO-C4X-191732)
- Fulvestrant-d3 (CAS CATO-C4X-19177)
Recommended Standards
- H-Leu-Trp-Met-Arg-OH (H-3975.0250) (CAS 67368-23-4)
- Alectinib Impurity 86 (CAS CATO-C4X-283686)
- 17-Keto Fulvestrant (CAS 403656-89-3)
- Periplocoside M (CAS 116782-73-1)
- Propranolol Impurity 32 (CAS CATO-C4X-151932)
- Flupentixol Impurity 31 (CAS CATO-C4X-189531)
- Eravacycline Impurity 9(TP-4705） (CAS CATO-C4X-29389)
- 2-(3-Cyano-4,6-dimethyl-2-oxopyridin-1(2H)-yl)-N-(2-methoxyphenyl)acetamide (CAS 878677-32-8)
- 2-(1-(4-Fluorobenzyl)-3-oxopiperazin-2-yl)acetic acid (CAS 1033600-10-0)
- 2-Isopropoxynicotinaldehyde (CAS 885278-10-4)
- 4-(6-Hydroxy-1-(p-tolyl)-1H-indazol-3-yl)benzene-1,3-diol (CAS 680610-95-1)
- Potassium (3-(tert-butoxycarbonyl)-7,7-difluoro-3-azabicyclo[4.1.0]heptan-6-yl)trifluoroborate (CAS 2853476-41-0)
- 2-Cyclopentaneamido-4,5-dimethoxybenzoic acid (CAS 749920-66-9)
- [14-31]-Semaglutide (CAS CATO-C4X-2226262)
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