25991-27-9 Methyl 2-oxo-2H-pyran-3-carboxylate MFCD00075443 3-Carbomethoxy-2-pyrone 2-Oxo-2H-pyran-3-carboxylic acid methyl ester CAS 25991-27-9
| CAS No. | 25991-27-9 |
| Molecular Formula | C7H6O4 |
| Molecular Weight | 154.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
25991-27-9 Methyl 2-oxo-2H-pyran-3-carboxylate MFCD00075443 3-Carbomethoxy-2-pyrone 2-Oxo-2H-pyran-3-carboxylic acid methyl ester (CAS 25991-27-9) is a high-purity analytical reference standard with the molecular formula C7H6O4 and a molecular weight of 154.12 g/mol.
Based on its molecular formula C7H6O4, 25991-27-9 Methyl 2-oxo-2H-pyran-3-carboxylate MFCD00075443 3-Carbomethoxy-2-pyrone 2-Oxo-2H-pyran-3-carboxylic acid methyl ester contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 154.12 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).
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 | C7H6O4 |
| Molecular Weight | 154.12 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
Recommended Standards
- Phyllostine (CAS 27270-89-9)
- 34415-10-6 4-Pyrimidinecarboxylic acid, 1,6-dihydro-2-methyl-6-oxo- (9CI) 4-Pyrimidinecarboxylic acid, 6-hydroxy-2-methyl- 2-Methylorotic acid NSC 58348 (CAS 34415-10-6)
- O-(4-Nitrophenyl)hydroxylamine (CAS 33543-55-4)
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- 3-((3-Methyl-4-nitrophenoxy)methyl)benzohydrazide (CAS 438220-54-3)
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