4-(4-Methoxy-3-nitrobenzylidene)-2-phenyloxazol-5(4H)-one CAS 904-42-7
| CAS No. | 904-42-7 |
| Molecular Formula | C13H20N4O |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-(4-Methoxy-3-nitrobenzylidene)-2-phenyloxazol-5(4H)-one (CAS 904-42-7), molecular formula C13H20N4OHCl and molecular weight 284.79 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C13H20N4OHCl, 4-(4-Methoxy-3-nitrobenzylidene)-2-phenyloxazol-5(4H)-one contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 284.79 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.
CATO manufactures 4-(4-Methoxy-3-nitrobenzylidene)-2-phenyloxazol-5(4H)-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C13H20N4O HCl |
| Molecular Weight | 284.79 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related Methoxy Standards
- 1-(2-Methoxy-6-(methylsulfonyl)phenyl)piperazine (CAS 1000018-42-7)
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Recommended Standards
- Ethyl 2-(5-chloro-2-ethoxyphenyl)-2-oxoacetate (CAS 1368208-35-8)
- 2-(6-Aminobenzo[d]oxazol-5-yl)propan-2-ol (CAS 2305771-35-9)
- 2-Chloro-N-(2,4-difluorophenyl)acetamide (CAS 96980-65-3)
- N-Methyl-2,4-dinitro-N-phenyl-6-(trifluoromethyl)aniline (CAS 63333-32-4)
- 2-(Quinazolin-4-yl)acetonitrile (CAS 112270-68-5)
- Onocerane I (8B(H),14a(H)) (CAS 56297-92-8)
- 6-Ethyl-3,4-dihydronaphthalen-1(2H)-one (CAS 22577-91-9)
- 3-Bromo-4-(ethylamino)-5-nitrobenzonitrile (CAS 1420800-37-8)
- S-(+)-Arundic Acid-d3 (CAS 1246819-98-6)
- Des-Gly34-Tirzepatide (CAS CATO-CPTD788940)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com