Fenoterol EP Impurity B (Enantiomer Mixture)HCl CAS 1944-11-2
| CAS No. | 1944-11-2 |
| Molecular Formula | C17H19NO4 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Fenoterol EP Impurity B (Enantiomer Mixture)HCl is closely related to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Fenoterol EP Impurity B (Enantiomer Mixture)HCl (CAS 1944-11-2) is a certified pharmaceutical impurity reference standard with the molecular formula C17H19NO4HCl and a molecular weight of 337.80 g/mol.
Fenoterol EP Impurity B (Enantiomer Mixture)HCl (C17H19NO4HCl) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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), Fenoterol EP Impurity B (Enantiomer Mixture)HCl 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 | C17H19NO4 HCl |
| Molecular Weight | 337.80 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-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 Hydrobromide (CAS 1944-12-3)
- Fenoterol EP Impurity C(Enantiomer Mixture) HBr (CAS 2469196-23-2)
- Fenoterol Hydrobromide Impurity B (CAS 3371-33-3)
- Fenoterol EP Impurity A HBr (CAS 38964-10-2)
Recommended Standards
- Betamethasone impurity 70 (CAS 1201919-11-0)
- Sulfamethoxazole Impurity 9 (CAS 18607-98-2)
- Tazobactam Impurity 34 (CAS CATO-C4X-120534)
- N~1~-Butyl-2-chloro-N~1~-methyl-1,4-benzenediamine (CAS 1019115-86-6)
- (S)-tert-Butyl 3-((2-chloropyrimidin-4-yl)oxy)pyrrolidine-1-carboxylate (CAS 1261235-62-4)
- 5-(Diethylamino)-3,6-dimethylpyrazine-2-carboxylic Acid (CAS 1434128-60-5)
- 2-(5-Phenyl-1h-1,2,3,4-tetrazol-1-yl)acetic acid (CAS 21743-58-8)
- tert-Butyl 4-(cyano(phenylamino)methyl)piperidine-1-carboxylate (CAS 1822840-00-5)
- 2-Iodo-3-trifluoromethyl-pyrazine (CAS 1286744-15-7)
- Fas C- Terminal Tripeptide (CAS 189109-90-8)
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