Flumazenil (N-[11C]Methyl) EP Impurity A CAS 79089-72-8
| CAS No. | 79089-72-8 |
| Molecular Formula | C14H12FN3O3 |
| Molecular Weight | 289.26 g/mol |
| 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.
Flumazenil (N-[11C]Methyl) EP Impurity A (CAS 79089-72-8) is a certified pharmaceutical impurity reference standard with the molecular formula C14H12FN3O3 and a molecular weight of 289.26 g/mol.
Structurally, Flumazenil (N-[11C]Methyl) EP Impurity A (C14H12FN3O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 289.26 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C14H12FN3O3 |
| Molecular Weight | 289.26 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Flumazenil Standards
- Flumazenil Impurity 8 (CAS 78755-82-5)
- Flumazenil Impurity 14 (CAS 1291916-17-0)
- Flumazenil EP Impurity E (CAS 78756-03-3)
- Flumazenil Impurity 21 (CAS CATO-C4X-143221)
- Flumazenil Impurity 20 (CAS CATO-C4X-143220)
- Flumazenil EP Impurity B (CAS 131666-45-0)
- Flumazenil Impurity 12 (CAS CATO-C4X-143212)
- Flumazenil EP Impurity A (CAS 84378-44-9)
Recommended Standards
- Amisulpride Impurity 43 (CAS 79893-22-4)
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- tert-Butyl (1-(4-bromophenyl)ethyl)(4-methoxybenzyl)carbamate (CAS 1704096-58-1)
- 5-(2-chloropyrimidin-4-yl)-1-methyl-1H-indazole (CAS 2254147-16-3)
- 5-(4-Nitrophenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine (CAS 338758-04-6)
- Methyl 4-Ethynylbenzoate (CAS 3034-86-4)
- 6-(2-Bromo-5-iodobenzyl)-2,3-dihydrobenzo[b][1,4]dioxine (CAS 1291094-65-9)
- Ethyl (E)-3-(thiazol-5-yl)acrylate (CAS 1431304-39-0)
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