2-Hydroxy-5-methyl-4-oxo-3h,4h-pyrido[2,3-d]pyrimidine-7-carboxylic acid CAS 1245569-58-7
| CAS No. | 1245569-58-7 |
| Molecular Formula | C9H7N3O4 |
| Molecular Weight | 221.17 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.
2-Hydroxy-5-methyl-4-oxo-3h,4h-pyrido[2,3-d]pyrimidine-7-carboxylic acid (CAS 1245569-58-7), molecular formula C9H7N3O4 and molecular weight 221.17 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H7N3O4, 2-Hydroxy-5-methyl-4-oxo-3h,4h-pyrido[2,3-d]pyrimidine-7-carboxylic acid 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 221.17 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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 | C9H7N3O4 |
| Molecular Weight | 221.17 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| 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.) | 1990 |
| Nitrogen Atoms | 3 |
Related Hydroxy Standards
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Recommended Standards
- 5-(Carboxymethyl)benzo[d]oxazole-2-carboxylic acid (CAS 1227406-90-7)
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- 7-Chloro-2,2,3-trimethyl-2,3-dihydroquinazolin-4(1H)-one (CAS 1268332-43-9)
- 6-Chloro-2-(difluoromethyl)-7-ethyl-7H-purine (CAS 1707571-16-1)
- 4-Chloro-5-(4-pyridinyl)thieno[2,3-d]pyrimidine (CAS 896423-19-1)
- 2',3'-Bis(4-bromophenyl)-1,1':4',1''-terphenyl (CAS 1397262-58-6)
- 2,3',4'-Trichloroacetophenone (CAS 42981-08-8)
- 2,4,6-Trichloro-3-methylpyridine (CAS 89487-72-9)
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