Fulvestrant EP Impurity B CAS 98008-06-1
| CAS No. | 98008-06-1 |
| Molecular Formula | C32H47F5O4S |
| Molecular Weight | 622.77 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 622.77 g/mol gives Fulvestrant EP Impurity B distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Fulvestrant EP Impurity B (CAS 98008-06-1) is a certified pharmaceutical impurity reference standard with the molecular formula C32H47F5O4S and a molecular weight of 622.77 g/mol.
Based on its molecular formula C32H47F5O4S, Fulvestrant EP Impurity B 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 622.77 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), Fulvestrant EP Impurity B 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 | C32H47F5O4S |
| Molecular Weight | 622.77 g/mol |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | F-containing |
| Sulfur Atoms | 1 |
Related Fulvestrant Standards
- Fulvestrant EP Impurity B (CAS CATO-C4X-191733)
- Fulvestrant 3-O-Methyl Impurity (CAS 1221256-46-7)
- Fulvestrant impurity 38 (CAS CATO-C4X-191738)
- Fulvestrant EP Impurity F (CAS CATO-C4X-19176)
- Fulvestrant impurity 55 (CAS CATO-C4X-191755)
- Fulvestrant Impurity 30 (CAS CATO-C4X-191730)
- Fulvestrant Impurity 60 (CAS 875573-69-6)
- Fulvestrant-d3 (CAS CATO-C4X-19177)
Recommended Standards
- Tetrandrine (CAS 518-34-3)
- Difelikefalin Impurity 76 (CAS CATO-C4X-304176)
- (±)-Inupadenant (CAS 2246607-06-5)
- D-Tetrandrine (CAS 477-57-6)
- Cefodizime Impurity 2 (CAS CATO-C4X-18062)
- Sarpogrelate impurity 15 (CAS CATO-C4X-291315)
- Terbinafine EP Impurity C HCI (CAS 877265-30-0)
- Dabigatran Etexilate Impurity 2 (CAS 333350-60-0)
- 2-(4-Bromo-2-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 321574-04-3)
- Tofacitinib Impurity 75 (CAS CATO-C4X-107975)
- 6-Bromo-3-hydroxy-2-phenyl-3,4-dihydroquinazolin-4-one (CAS 477864-80-5)
- 3',5'-Dichloro-2-methoxy-[1,1'-biphenyl]-4-carboxylic acid (CAS 1261914-31-1)
- 1-[4-(Aminomethyl)phenyl]-N-tert-butylmethanesulfonamide (CAS 1036546-99-2)
- GnRH Associated Peptide (GAP) (1-13), human (CAS 100111-07-7)
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