2-Methyl-4-(2-nitrobenzylidene)oxazol-5(4H)-one CAS 85986-91-0
| CAS No. | 85986-91-0 |
| Molecular Formula | C11H8N2O4 |
| Molecular Weight | 232.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 232.19 g/mol gives 2-Methyl-4-(2-nitrobenzylidene)oxazol-5(4H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2-Methyl-4-(2-nitrobenzylidene)oxazol-5(4H)-one (CAS 85986-91-0), molecular formula C11H8N2O4 and molecular weight 232.19 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 2-Methyl-4-(2-nitrobenzylidene)oxazol-5(4H)-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 232.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C11H8N2O4 |
| Molecular Weight | 232.19 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 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1981 |
| Nitrogen Atoms | 2 |
Related Methyl Standards
- 2-Methyl-4-(3-nitrobenzylidene)oxazol-5(4H)-one (CAS 57731-07-4)
- 3-Methyl-4-(2-nitrobenzylidene)-1H-pyrazol-5(4H)-one (CAS 10234-90-9)
- 3-(4-Nitrobenzylidene)pentane-2,4-dione (CAS 29197-16-8)
- 2-(2-NITROBENZYLIDENE)MALONIC ACID (CAS 103582-31-6)
- N-(2-Nitrobenzylidene)aniline (CAS 17064-77-6)
- (E)-2-(4-Nitrobenzylidene)hydrazine-1-carbothioamide (CAS 180864-33-9)
- 2-((2-Nitrobenzylidene)amino)aniline (CAS 10173-60-1)
- 2-(3-nitrobenzylidene)cyclopentanone (CAS 507227-92-1)
Recommended Standards
- 2-Cyclopropyl-5-nitro-1H-isoindole-1,3(2H)-dione (CAS 307990-28-9)
- 2-Carbamoyl-8-hydroxyquinoline-7-carboxylic acid (CAS 512539-50-3)
- 2-methyl-4-[(4-nitrophenyl)methylidene]-4,5-dihydro-1,3-oxazol-5-one (CAS 78312-00-2)
- 2-Aminoquinoline-3,4-dicarboxylic acid (CAS 27388-43-8)
- 5-Cyclopropoxy-4-nitronicotinaldehyde (CAS 1243471-34-2)
- 4-[(4-Methoxyphenyl)methyl]oxane-4-carboxylic acid (CAS 1380300-77-5)
- Methyl 2-((3-cyano-4-(4-methoxyphenyl)-6-phenylpyridin-2-yl)thio)acetate (CAS 314764-25-5)
- 2-(Bromomethoxy)-3-fluorobenzonitrile (CAS 1208078-40-3)
- 1-(2-Aminophenyl)cyclopropanecarboxylic Acid (CAS 1356477-25-2)
- N-Butyryl-d7-glycine (CAS 20208-73-5)
- 1-(3-Aminopropyl)pyridin-2(1H)-one (CAS 102675-58-1)
- [4-methyl-2-(methylsulfanyl)phenyl]methanamine (CAS 1249234-36-3)
- (E)-3-chloro-2-(2-(thiophen-2-ylmethylene)hydrazinyl)-5-(trifluoromethyl)pyridine (CAS 338795-24-7)
- Semaglutide impurity 55 (CAS CATO-C4X-222655)
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