4-Methyl-2-(4-nitrophenyl)oxazole-5-carboxylic acid CAS 1243440-61-0
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 1243440-61-0 |
| Molecular Formula | C11H8N2O5 |
| Molecular Weight | 248.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Methyl-2-(4-nitrophenyl)oxazole-5-carboxylic acid (CAS 1243440-61-0) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C11H8N2O5. Molecular weight: 248.19 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C11H8N2O5 |
| Molecular Weight | 248.19 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.) | 1990 |
| Nitrogen Atoms | 2 |
Related Methyl Standards
- Methyl 2-(4-Nitrophenyl)oxazole-4-carboxylate (CAS 1171126-87-6)
- 5-Methyl-1-(4-nitrophenyl)-1h-1,2,3-triazole-4-carboxylic acid (CAS 1217-99-8)
- Methyl 5-(2-Nitrophenyl)isoxazole-3-carboxylate (CAS 1375064-51-9)
- Methyl 5-(3-nitrophenyl)-1,3-oxazole-4-carboxylate (CAS 1820687-81-7)
- 2-(3-Methyl-4-nitrophenyl)oxazole-4-carboxylic acid (CAS 885273-86-9)
- 5-Methyl-1-(3-nitrophenyl)-1h-1,2,3-triazole-4-carboxylic acid (CAS 929975-73-5)
- 5-Methyl-3-(3-nitrophenyl)isoxazole-4-carboxylic acid (CAS 38694-05-2)
- 5-Methyl-3-(4-nitrophenyl)isoxazole-4-carboxylic acid (CAS 7123-64-0)
Recommended Standards
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- Morpholinomethanol (CAS 4432-43-3)
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