Brivaracetam Impurity 166 CAS 2755924-55-9
| CAS No. | 2755924-55-9 |
| Molecular Formula | C11H19NO3 |
| Molecular Weight | 213.27 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C11H19NO3, Brivaracetam Impurity 166 contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 213.27 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Brivaracetam Impurity 166 (CAS 2755924-55-9) is a certified pharmaceutical impurity reference standard with the molecular formula C11H19NO3 and a molecular weight of 213.27 g/mol.
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 | C11H19NO3 |
| Molecular Weight | 213.27 g/mol |
| Appearance | White to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2002 |
| Nitrogen Atoms | 1 |
Related Brivaracetam Standards
- Brivaracetam Impurity 37 (CAS 2165431-90-1)
- Brivaracetam Impurity 5 (CAS 943986-67-2)
- Brivaracetam Impurity 53 (CAS CATO-C4X-200753)
- Brivaracetam Impurity 54 (CAS CATO-C4X-200754)
- Brivaracetam Impurity 39 (CAS 765887-92-1)
- Brivaracetam (CAS 357336-20-0)
- Brivaracetam impurity 104 (CAS 357334-83-9)
- Brivaracetam Impurity 131 (CAS CATO-C4X-2007131)
Recommended Standards
- Irbesartan Impurity 3 (CAS 15026-80-9)
- Irbesartan Impurity 23 (CAS CATO-C4X-166623)
- 6-oxo-6-(piperidin-1-yl)hexanoic acid (CAS 1862-16-4)
- 3-Carboxy-6-methoxyquinoline 6-methoxyquinoline-3-carboxylic acid 71082-47-8 (CAS 71082-47-8)
- Mirabegron Impurity 11 (CAS 1684452-80-9)
- N-Nitroso Dalilesen impurity 37 (CAS CATO-C4X-301037)
- Dapagliflozin Impurity 19 (CAS 1204222-85-4)
- n-Ethyl-2-(ethylamino)acetamide (CAS 97454-46-1)
- 2-Amino-1-(4-ethylphenyl)-4,5-dimethyl-1H-pyrrole-3-carbonitrile (CAS 1094337-62-8)
- 4-(4-Chloro-3-methylphenoxy)piperidinehydrochloride (CAS 1220028-22-7)
- 2-(2-Chloro-6-(piperidin-1-yl)-9H-purin-9-yl)acetic acid (CAS 1383626-14-9)
- 3-Amino-6-chloro-5-(2-chlorophenyl)-1-methylquinolin-2(1H)-one (CAS 76684-34-9)
- Methyl 2,2-Difluoro-1,3-benzodioxole-5-carboxylate (CAS 773873-95-3)
- Semaglutide impurity 94 (CAS CATO-C4X-222694)
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