Fulvestrant impurity 45 CAS CATO-C4X-191745
| CAS No. | CATO-C4X-191745 |
| Molecular Formula | C32H45F5O2S |
| Molecular Weight | 588.76 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, a polycyclic aromatic system, Fulvestrant impurity 45 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 588.76 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 supplies Fulvestrant impurity 45 (CAS CATO-C4X-191745), a pharmacopoeial impurity reference standard (molecular formula C32H45F5O2S, MW 588.76 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
CATO manufactures Fulvestrant impurity 45 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 | C32H45F5O2S |
| Molecular Weight | 588.76 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| 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 37 (CAS CATO-C4X-191737)
- Fulvestrant impurity 58 (CAS CATO-C4X-191758)
- Fulvestrant Impurity 31 (CAS CATO-C4X-191731)
- Fulvestrant Impurity 16 (CAS CATO-C4X-191716)
- Fulvestrant Impurity 17 (CAS CATO-C4X-191717)
- Fulvestrant impurity 36 (CAS CATO-C4X-191736)
- Fulvestrant EP Impurity E (CAS 2170200-14-1)
- Fulvestrant impurity 53 (CAS CATO-C4X-191753)
Recommended Standards
- Flupentixol Impurity N38 (CAS 30909-51-4)
- 5,5''-Bis(4'-fluoro-[1,1'-biphenyl]-4-yl)-2,2':5',2''-terthiophene (CAS 1266111-48-1)
- NO-Feng-PDMPRa (CAS 1132049-44-5)
- 4,4'-(5'-(4-(3,5-Dimethyl-1H-pyrazol-4-yl)phenyl)-[1,1':3',1''-terphenyl]-4,4''-diyl)bis(3,5-dimethyl-1H-pyrazole) (CAS 1874148-68-1)
- Sulindac Impurity 9 (CAS CATO-C4X-29309)
- Mirogabalin impurity 169 (CAS 2007951-40-6)
- Cefoperazone Impurity 9 (CAS CATO-C4X-11499)
- Dox-Ph-PEG1-Cl (CAS 773095-86-6)
- 4-Amino-2-bromo-6-(difluoromethyl)nicotinaldehyde (CAS 1805053-81-9)
- 2-(4-Methoxy-3-methylphenyl)-1H-indole (CAS 58697-59-9)
- 6-chloro-3H-[1,2,3]triazolo[4,5-b]pyridine (CAS 408314-14-7)
- (2S,4S)-1-(tert-Butoxycarbonyl)-4-(2,4,6-trifluorophenoxy)-2-pyrrolidinecarboxylic acid (CAS 869682-14-4)
- Oseltamivir Impurity 88 (CAS CATO-C4X-172088)
- Lixisenatide (CAS 320367-13-3（free base）)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com