Ethyl 2-(4-nitrophenyl)oxazole-4-carboxylate CAS 78979-63-2
| CAS No. | 78979-63-2 |
| Molecular Formula | C12H10N2O5 |
| Molecular Weight | 262.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Ethyl 2-(4-nitrophenyl)oxazole-4-carboxylate (CAS 78979-63-2), molecular formula C12H10N2O5 and molecular weight 262.22 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Ethyl 2-(4-nitrophenyl)oxazole-4-carboxylate (C12H10N2O5) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 262.22 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.
As a certified reference material (CRM), Ethyl 2-(4-nitrophenyl)oxazole-4-carboxylate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C12H10N2O5 |
| Molecular Weight | 262.22 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- Ethyl 2-(2-nitrophenyl)oxazole-4-carboxylate (CAS 1220039-55-3)
- Methyl 2-(3-(2-nitrophenyl)-1H-1,2,4-triazol-1-yl)acetate (CAS 1416338-89-0)
- Ethyl 3-(4-nitrophenyl)-1H-1,2,4-triazole-5-carboxylate (CAS 1416338-94-7)
- Ethyl 5-(2-nitrophenyl)-1H-1,2,4-triazole-3-carboxylate (CAS 1416347-70-0)
- Ethyl 5-(4-Nitrophenyl)isoxazole-3-carboxylate (CAS 159670-70-9)
- Ethyl 5-(3-Nitrophenyl)isoxazole-3-carboxylate (CAS 866040-66-6)
- Ethyl 5-(3-nitrophenyl)oxazole-4-carboxylate (CAS 916674-05-0)
- Ethyl5-(4-nitrophenyl)oxazole-4-carboxylate (CAS 72030-87-6)
Recommended Standards
- Ethyl (E)-2-cyano-2-(2-(3-nitrophenyl)hydrazono)acetate (CAS 30006-52-1)
- Ethyl 2-(5-Nitro-3-indolyl)-2-oxoacetate (CAS 91974-31-1)
- 6-Ethoxy-5-nitroquinoline-4-carboxylic acid (CAS 89267-26-5)
- Ethyl 2-(6-Nitro-3-indolyl)-2-oxoacetate (CAS 91974-32-2)
- Methyl 2-(5-methoxy-1,6-dimethyl-2,4-dioxo-1,4-dihydropyrido[2,3-d]pyrimidin-3(2H)-yl)acetate (CAS 921467-05-2)
- Saccharin Calcium (150 mg) (CAS 6485-34-3)
- 9-Oxo-9H-fluorene-4-carbonitrile (CAS 4269-20-9)
- 2,2'-Azanediyldiphenol (CAS 2391-71-1)
- (4Z,7Z,10Z,13Z,16Z)-4,7,10,13,16,19-Eicosahexaenoic acid ethyl ester (CAS 2447131-67-9)
- 2-(4-Methoxyphenyl)-pyridine (CAS 5957-90-4)
- 2-(6-(3-Propyl-1,2,4-oxadiazol-5-yl)-[1,2,4]triazolo[4,3-a]pyridin-3-yl)acetic acid (CAS 1355175-54-0)
- 3-(p-Tolyl)furan-2,5-dione (CAS 3152-16-7)
- 4-Chloro-6,6,7-trimethyl-5,6-dihydroquinazoline (CAS 1256955-53-9)
- Tirzepatide Impurity 37 (CAS CATO-C4X-324037)
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