5-Methyl-2-(methylthio)-6-oxo-3,6-dihydropyrimidine-4-carboxylic acid CAS 6635-65-0
| CAS No. | 6635-65-0 |
| Molecular Formula | C23H25NO4 |
| Molecular Weight | 379.45 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 379.45 g/mol gives 5-Methyl-2-(methylthio)-6-oxo-3,6-dihydropyrimidine-4-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-Methyl-2-(methylthio)-6-oxo-3,6-dihydropyrimidine-4-carboxylic acid (CAS 6635-65-0), molecular formula C23H25NO4 and molecular weight 379.45 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-Methyl-2-(methylthio)-6-oxo-3,6-dihydropyrimidine-4-carboxylic acid (C23H25NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 379.45 g/mol, it falls into the moderately-high-molecular-weight range. 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 | C23H25NO4 |
| Molecular Weight | 379.45 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
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Recommended Standards
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- Cinnamyltriphenylphosphonium Bromide (CAS 38633-40-8)
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- 2-(Diaminomethylene)-5,5-dimethylcyclohexane-1,3-dione (CAS 384811-20-5)
- 1-(4,5-Dimethyl-4h-1,2,4-triazol-3-yl)-4-ethylcyclohexan-1-amine (CAS 1247655-78-2)
- 2-Chloro-n-[(3-chlorophenyl)(phenyl)methyl]acetamide (CAS 1311314-64-3)
- 4-(3-Chloro-4-methoxyphenyl)pyrrolidin-2-one (CAS 1367448-15-4)
- 1-((4-(4-Nitro-2-(trifluoromethyl)phenoxy)phenyl)sulfonyl)piperidine (CAS 1858240-22-8)
- (2S)-2-Fluoro-4-methylpentanoic acid (CAS 126957-44-6)
- Ilaprazole Impurity 21 (cis- and trans- mixture) (CAS 696-59-3)
- 1-(2-Chlorobenzyl)-N-(4-ethoxyphenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide (CAS 400077-77-2)
- Acetyl Tripeptide-1 (CAS 350595-76-5)
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