Ethyl 2-(3-oxo-3,4-dihydroquinoxalin-2(1H)-ylidene)acetate CAS 30681-63-1
| CAS No. | 30681-63-1 |
| Molecular Formula | C12H12N2O3 |
| Molecular Weight | 232.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 232.24 g/mol gives Ethyl 2-(3-oxo-3,4-dihydroquinoxalin-2(1H)-ylidene)acetate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Ethyl 2-(3-oxo-3,4-dihydroquinoxalin-2(1H)-ylidene)acetate (CAS 30681-63-1), molecular formula C12H12N2O3 and molecular weight 232.24 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Ethyl 2-(3-oxo-3,4-dihydroquinoxalin-2(1H)-ylidene)acetate (C12H12N2O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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 232.24 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C12H12N2O3 |
| Molecular Weight | 232.24 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Nitrogen Atoms | 2 |
Recommended Standards
- Ethyl 2-(3-aminophenyl)oxazole-4-carboxylate (CAS 885274-73-7)
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- Ethyl 2-(4-oxo-3,4-dihydrophthalazin-1-yl)acetate (CAS 25947-13-1)
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