5-Pyridin-3-yl-oxazole-2-carboxylic acid ethyl ester CAS 857334-87-3
| CAS No. | 857334-87-3 |
| Molecular Formula | C11H10N2O3 |
| Molecular Weight | 218.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Pyridin-3-yl-oxazole-2-carboxylic acid ethyl ester (CAS 857334-87-3), molecular formula C11H10N2O3 and molecular weight 218.21 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H10N2O3, 5-Pyridin-3-yl-oxazole-2-carboxylic acid ethyl ester 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 218.21 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).
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 | C11H10N2O3 |
| Molecular Weight | 218.21 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
Related Pyridin Standards
- 5-Methyl-1-(pyridin-4-ylmethyl)-1h-1,2,3-triazole-4-carboxylic acid (CAS 1248975-23-6)
- 5-Ethyl-3-(pyridin-3-yl)-1,2-oxazole-4-carboxylic acid (CAS 1340031-52-8)
- Ethyl 5-(pyridin-3-yl)-1h-1,2,4-triazole-3-carboxylate (CAS 1343270-71-2)
- Methyl 2-(3-(pyridin-3-yl)-1H-1,2,4-triazol-1-yl)acetate (CAS 1416339-39-3)
- Methyl 2-(3-(pyridin-2-yl)-1H-1,2,4-triazol-1-yl)acetate (CAS 1416340-58-3)
- 1-(1-(Pyridin-3-yl)ethyl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1437432-72-8)
- 1-(1-(Pyridin-2-yl)ethyl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1437432-83-1)
- 1-(1-(Pyridin-4-yl)ethyl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1437433-09-4)
Recommended Standards
- 5-Oxo-1-(p-tolyl)-4,5-dihydro-1H-pyrazole-3-carboxylic acid (CAS 64123-68-8)
- 6-(3-Methoxyphenyl)pyrimidine-2,4(1H,3H)-dione (CAS 33166-92-6)
- 5-Methoxyindole-3-glyoxylamide (CAS 52055-22-8)
- 6-(4-Methoxyphenyl)pyrimidine-2,4-diol (CAS 33166-97-1)
- Ethyl ((1-(hydroxymethyl)cyclopropyl)methyl)carbamate (CAS 1160264-42-5)
- Methyl 2-{[(2-methylphenyl)methyl]amino}acetate (CAS 746585-43-3)
- N-((1H-benzo[d][1,2,3]triazol-1-yl)methyl)-4-chloro-N-methylaniline (CAS 300680-05-1)
- 1-(2,3-Dihydro-1,4-benzodioxin-6-yl)-3-(3-phenylpyrrolidin-1-yl)propan-1-one (CAS 33743-96-3)
- tert-Butyl 3-(6-amino-3-methylpyridin-2-yl)benzoate (CAS 1083057-14-0)
- 3-Amino-2-methylphenol (CAS 53222-92-7)
- 1-Ethynylcyclobutanol (CAS 98135-75-2)
- 4-Ethyl-1-methyl-3-(pyridin-3-yl)-1h-pyrazol-5-amine (CAS 1156894-45-9)
- 1,2-Diphenyl-1,2,4-triazolidine-3,5-dione (CAS 34877-12-8)
- Insulin Degludec Impurity 2 (CAS CATO-C4X-21572)
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