Fulvestrant Impurity 29 CAS CATO-C4X-191729
| CAS No. | CATO-C4X-191729 |
| Molecular Formula | C34H49F5O4S |
| Molecular Weight | 648.81 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Fulvestrant Impurity 29 (C34H49F5O4S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, a polycyclic aromatic 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a process- or degradation-related impurity, Fulvestrant Impurity 29 (CAS CATO-C4X-191729, C34H49F5O4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 | C34H49F5O4S |
| Molecular Weight | 648.81 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 21 (CAS 261506-24-5)
- Fulvestrant Impurity 60 (CAS 875573-69-6)
- Fulvestrant Impurity 30 (CAS CATO-C4X-191730)
- Fulvestrant impurity 35 (CAS CATO-C4X-191735)
- Fulvestrant EP Impurity D (CAS 2483797-59-5)
- Fulvestrant impurity 55 (CAS CATO-C4X-191755)
- Fulvestrant EP Impurity B (CAS 98008-06-1)
- Fulvestrant EP Impurity B (CAS CATO-C4X-191733)
Recommended Standards
- Quinovic acid 3-O-β-D-glucoside (CAS 79955-41-2)
- Glutathione Impurity 14 (CAS CATO-C4X-118514)
- 1,4,5,8-Tetraamino-2,6-bis(3-heptylphenoxy)anthracene-9,10-dione (CAS 88600-17-3)
- Brexpiprazole Impurity 75 (CAS CATO-C4X-113175)
- Entacapone EP Impurity F (CAS 160391-70-8)
- Reproterol impurity 2 (CAS CATO-C4X-30992)
- Peramivir Impurity 126 (CAS CATO-C4X-1833126)
- 5-Chloro-2-(2-(2-hydroxyethoxy)ethyl)-2H-benzo[f]isoindole-4,9-dione (CAS 89479-38-9)
- 4-Chloro-2-[(2Z)-2-(4-chlorophenyl)-2-(methoxyimino)ethyl]-5-(pyrrolidin-1-yl)-2,3-dihydropyridazin-3-one (CAS 477855-94-0)
- 1187171-06-7 2-(3-Chlorobenzoyl)-3-methylpyridine MFCD13152780 (CAS 1187171-06-7)
- 2-(Methylsulfonyl)-10H-phenothiazine 5,5-dioxide (CAS 1391051-98-1)
- (E)-5-Decen-1-ol (CAS 56578-18-8)
- 4-Borono-3-fluorobenzoic acid (CAS 851335-07-4)
- FMRF-Like Peptide from snail Helix aspersa (CAS 98495-35-3)
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