6-Nitro-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one CAS 337463-64-6
| CAS No. | 337463-64-6 |
| Molecular Formula | C7H5N3O4 |
| Molecular Weight | 195.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 195.13 g/mol gives 6-Nitro-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
6-Nitro-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one (CAS 337463-64-6), molecular formula C7H5N3O4 and molecular weight 195.13 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H5N3O4, 6-Nitro-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one 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 195.13 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C7H5N3O4 |
| Molecular Weight | 195.13 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
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- 1-(4,5-Dihydro-1H-imidazol-2-yl)-3-methyl-1H-pyrazole (CAS 786588-78-1)
- 4-(Benzylamino)butan-2-one (CAS 46231-21-4)
- Rel-(3R,4S,5S)-5-((R)-1,2-dihydroxyethyl)-3,4-dihydroxydihydrofuran-2(3H)-one (CAS 3327-64-8)
- 1-Bromo-3-(bromomethyl)-2-chloro-5-fluorobenzene (CAS 2091679-77-3)
- Semaglutide impurity 215 (CAS CATO-C4X-2226215)
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