Fenoterol Impurity 8 xHBr CAS CATO-C4X-20779
| CAS No. | CATO-C4X-20779 |
| Molecular Formula | C17H20BrNO4 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Fenoterol Impurity 8 xHBr (CAS CATO-C4X-20779) is a certified pharmaceutical impurity reference standard with the molecular formula C17H20BrNO4xHBr and a molecular weight of 463.17 g/mol.
The molecular framework of Fenoterol Impurity 8 xHBr (C17H20BrNO4xHBr) is characterized by a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, 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.
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 | C17H20BrNO4 xHBr |
| Molecular Weight | 463.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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 | Br-containing |
| Nitrogen Atoms | 1 |
Related Fenoterol Standards
- Fenoterol EP Impurity A (Enantiomer Mixture) (CAS 107878-38-6)
- Fenoterol-d6 Hydrobromide (CAS 1286129-04-1)
- Fenoterol (CAS 13392-18-2)
- Fenoterol Impurity 4 (CAS 161040-25-1)
- Fenoterol EP Impurity B (Enantiomer Mixture)HCl (CAS 1944-11-2)
- Fenoterol Hydrobromide (CAS 1944-12-3)
- Fenoterol EP Impurity C(Enantiomer Mixture) HBr (CAS 2469196-23-2)
- Fenoterol Hydrobromide Impurity B (CAS 3371-33-3)
Recommended Standards
- Baloxavir Impurity 71 (CAS 2390386-54-4)
- Lobeline Impurity 5 HCl (CAS CATO-C4X-18185)
- Methylene blue Impurity 9 (CAS CATO-C4X-18969)
- Ethyl 9-fluorodecanoate (CAS 63977-32-2)
- Chlorophorin (CAS 537-41-7)
- N-cyclopropyl-4-methyl-3-nitroaniline (CAS 1339432-84-6)
- Methyl 1-(2-chloroacetyl)piperidine-4-carboxylate (CAS 730949-63-0)
- (2R,3S,4R)-2-(Hydroxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate (CAS 82295-98-5)
- 2-(4-Fluorophenyl)-7,8-dihydroimidazo[1,2-a]pyrazin-6(5H)-one (CAS 1261117-82-1)
- SAMS Peptide (CAS 125911-68-4)
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