Fulvestrant impurity 32 CAS CATO-C4X-191732
| CAS No. | CATO-C4X-191732 |
| Molecular Formula | C32H47F5O3S |
| Molecular Weight | 606.77 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Fulvestrant impurity 32 (CAS CATO-C4X-191732, C32H47F5O3S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C32H47F5O3S, Fulvestrant impurity 32 contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 606.77 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
Physical & Chemical Properties
| Molecular Formula | C32H47F5O3S |
| Molecular Weight | 606.77 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-containing |
| Sulfur Atoms | 1 |
Related Fulvestrant Standards
- 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 36 (CAS CATO-C4X-191736)
- Fulvestrant EP Impurity E (CAS 2170200-14-1)
- Fulvestrant impurity 53 (CAS CATO-C4X-191753)
- Fulvestrant-d3 (CAS CATO-C4X-19177)
Recommended Standards
- 156856-31-4 Fusapyrone 2H-Pyran-2-one, 3-(4-deoxy-beta-xylo-hexopyranosyl)-4-hydroxy-6-(2-hydroxy-7-(hydroxymethyl)-1,1,5,9,11-pentamethyl-3,5,8-heptadecatrienyl)- 3-(4-Deoxy-beta-xylohexapyranosyl)-4-hydroxy-6-(2-hydroxy-7-hydroxymethyl-1,1,5,9,11-pentamethyl-3,5,8-heptadecatrienyl)-2H-pyran-2-one 3-(4-Deoxy-beta-xylo-hexopyranosyl)-4-hydroxy-6-(2-hydroxy-7-(hydroxymethyl)-1,1,5,9,11-pentamethyl-3,5,8-heptadecatrienyl)-2H-pyran-2-one (CAS 156856-31-4)
- Tert-butyl 3-oxo-1-(pyridin-2-yldisulfanyl)-7,10,13,16,19,22-hexaoxa-4-azapentacosan-25-oate (CAS 1818294-34-6)
- 3'-Ethoxy-5,6-dihydro Spinosyn J 17-pseudoaglycone (CAS 2055494-09-0)
- 927209-87-8 Neofusapyrone (CAS 927209-87-8)
- Mirogabalin Impurity 85 (CAS CATO-C4X-292485)
- Baricitinib Impurity 17 (CAS 1187595-89-6)
- Cenobamate Impurity 14 (CAS CATO-C4X-241614)
- 4-(Difluoromethyl)-2-iodo-3-methoxy-5-(trifluoromethyl)pyridine (CAS 1805258-71-2)
- N-(2-Chlorophenyl)glycine (CAS 6961-49-5)
- Methyl 3,5-Dibromobenzoate (CAS 51329-15-8)
- 2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-2-(4,4-difluorocyclohexyl)acetic acid (CAS 2279457-71-3)
- 1-Chloro-4-((prop-2-yn-1-yloxy)methyl)benzene (CAS 4039-86-5)
- (4-Aminopiperidin-1-yl)(2-(trifluoromethyl)phenyl)methanone hydrochloride (CAS 1774898-61-1)
- Neuropeptide W-23 (rat) (CAS 383415-89-2)
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