Fenoterol Hydrobromide Impurity B CAS 3371-33-3
| CAS No. | 3371-33-3 |
| Molecular Formula | C17H19NO4 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Fenoterol Hydrobromide Impurity B (CAS 3371-33-3), molecular formula C17H19NO4HBr and molecular weight 382.25 g/mol, is a CATO reference standard with documented purity and traceability.
Fenoterol Hydrobromide Impurity B (C17H19NO4HBr) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine 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.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C17H19NO4 HBr |
| Molecular Weight | 382.25 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 | 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 EP Impurity A HBr (CAS 38964-10-2)
Recommended Standards
- 2,2,2-trifluoroethyl N-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]carbamate (CAS 1269151-65-6)
- 2-(5-Chloro-4-formyl-2-methoxyphenoxy)-N-(p-tolyl)acetamide (CAS 1427024-97-2)
- 2-(Morpholine-4-carbonyl)-1-benzofuran-3-amine (CAS 871217-33-3)
- 5-Bromo-6-fluorobenzo[d]oxazole-2(3H)-thione (CAS 1553227-03-4)
- (4S,αS)-4-Benzyl-3-(α-methyl-1-oxohexyl)-2-oxazolidinone-d3 (CAS 1329812-07-8)
- Benzyl 2-(5-methyl-6-(pyrrolidin-1-yl)pyridin-3-yl)piperidine-1-carboxylate (CAS 1352499-61-6)
- Hexadecylboronic acid (CAS 101433-38-9)
- 25784-58-1 1-Benzyl-1H-1,2,3-triazol-5-amine MFCD11983439 (CAS 25784-58-1)
- 1-(2,3-Dichlorophenyl)guanidine (CAS 41214-03-3)
- Peptide 437 (CAS CATO-CPTD788437)
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