Ethyl 7-fluoro-3-oxo-3,4-dihydroquinoxaline-2-carboxylate CAS 55496-01-0
| CAS No. | 55496-01-0 |
| Molecular Formula | C11H9FN2O3 |
| Molecular Weight | 236.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 236.20 g/mol gives Ethyl 7-fluoro-3-oxo-3,4-dihydroquinoxaline-2-carboxylate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Ethyl 7-fluoro-3-oxo-3,4-dihydroquinoxaline-2-carboxylate (CAS 55496-01-0), molecular formula C11H9FN2O3 and molecular weight 236.20 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Ethyl 7-fluoro-3-oxo-3,4-dihydroquinoxaline-2-carboxylate (C11H9FN2O3) 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 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 236.20 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C11H9FN2O3 |
| Molecular Weight | 236.20 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, keep tightly closed to prevent evaporation |
| 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; 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.) | 1972 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
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Recommended Standards
- ethyl 5-(4-fluorophenyl)-1,3,4-oxadiaZole-2-carboxylate (CAS 950259-82-2)
- Ethyl 7-fluoro-4-oxo-4H-chromene-2-carboxylate (CAS 865449-53-2)
- Ethyl 5-(2-fluorophenyl)-1,3,4-oxadiazole-2-carboxylate (CAS 68496-86-6)
- Methyl (2E)-4-(diethoxyphosphinyl)-2-butenoate (CAS 67629-62-3)
- (E)-3-(4,4,4-Trifluoro-3-oxobut-1-en-1-yl)benzonitrile (CAS 101048-56-0)
- Phosphorous Acid-D3DISCONTINUED (CAS 57583-55-8)
- (3S,4R)-4-Methoxypyrrolidin-3-ol (CAS 473298-28-1)
- 4',5'-Dimethyl-1h,4'h-[3,3'-bi(1,2,4-triazol)]-5-amine (CAS 1339923-37-3)
- 6-Chloro-2-(trifluoromethyl)oxazolo[5,4-b]pyridine (CAS 1196153-60-2)
- 2-Methyl-1-phenylpropane-d14 (CAS 350818-58-5)
- 1,4,5,6,7,8-Hexahydropyrazolo[4,3-b]azepine (CAS 933705-54-5)
- 3-(Piperidin-1-yl)-4H-chromen-4-one (CAS 40302-79-2)
- 4-((2-Hydroxyethyl)amino)phenol (CAS 49865-92-1)
- Semaglutide impurity 81 (CAS CATO-C4X-222681)
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