2,7-Dimethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylic acid CAS 338751-34-1
| CAS No. | 338751-34-1 |
| Molecular Formula | C15H11NO4 |
| Molecular Weight | 269.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 2,7-Dimethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylic acid 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.
2,7-Dimethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylic acid (CAS 338751-34-1) is a high-purity analytical reference standard with the molecular formula C15H11NO4 and a molecular weight of 269.25 g/mol.
2,7-Dimethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylic acid (C15H11NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
Physical & Chemical Properties
| Molecular Formula | C15H11NO4 |
| Molecular Weight | 269.25 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, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
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