6-(Methylthio)-2-oxo-2,3-dihydropyrimidine-4-carboxylic acid CAS 6299-84-9
| CAS No. | 6299-84-9 |
| Molecular Formula | C6H6N2O3S |
| Molecular Weight | 186.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
6-(Methylthio)-2-oxo-2,3-dihydropyrimidine-4-carboxylic acid (CAS 6299-84-9), molecular formula C6H6N2O3S and molecular weight 186.19 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C6H6N2O3S, 6-(Methylthio)-2-oxo-2,3-dihydropyrimidine-4-carboxylic acid contains an amide group, a sulfone group, 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 186.19 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).
As a certified reference material (CRM), 6-(Methylthio)-2-oxo-2,3-dihydropyrimidine-4-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.
Physical & Chemical Properties
| Molecular Formula | C6H6N2O3S |
| Molecular Weight | 186.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methylthio Standards
- 2-(Methylthio)-5-nitropyrimidin-4-amine (CAS 84928-85-8)
- 2-(Methylthio)-6-oxo-3,6-dihydropyrimidine-4-carboxylic acid (CAS 6314-14-3)
- 3-(Methylthio)-6-oxo-1,6-dihydro-1,2,4-triazine-5-carboxamide (CAS 96259-33-5)
- 2-((2-(Methylthio)pyrimidin-4-yl)oxy)ethanol (CAS 112010-47-6)
- 2-(Methylthio)-3-(1H-pyrazol-1-yl)propanoic acid (CAS 1239734-92-9)
- 5-(1-(Methylthio)ethyl)furan-2-carboxylic acid (CAS 1263208-98-5)
- 5-Ethyl-2-(methylthio)pyrimidine-4,6-diol (CAS 42039-70-3)
- 2-(Methylthio)spiro[3.3]heptane-2-carboxylic acid (CAS 1485191-94-3)
Recommended Standards
- 5-Methylthiophene-2,3-dicarboxylic Acid (CAS 46029-22-5)
- 6-Fluoro-2-methylquinoline-5-carbonitrile (CAS 86053-15-8)
- 5-methyl-4-nitrothiophene-2-carboxamide (CAS 36050-10-9)
- Benzo[c][1,2,5]thiadiazole-4,7-dicarbonitrile (CAS 20138-79-8)
- N-(3-Amino-4-chlorophenyl)-2-(2-chlorophenoxy)-propanamide (CAS 1020055-01-9)
- N-(4-acetyl-2,6-difluorophenyl)methanesulfonamide (CAS 956901-21-6)
- 1-Benzyl-6-methoxy-1H-indole-3-carbaldehyde (CAS 1134334-46-5)
- N-((1H-indol-4-yl)methyl)cyclopropanamine (CAS 1079-34-1)
- Boc-Lys(nicotinoyl)-OH (CAS 14609-04-2)
- 5,6-Dimethyl-1H-pyrrolo[2,3-b]pyridine (CAS 1000340-92-0)
- 6-Chloroisoquinoline-8-carboxylic acid (CAS 2137783-58-3)
- Isothiazolidin-3-one 1,1-Dioxide (CAS 15441-09-5)
- 3-Chloro-6-[2-(1-methanesulfonyl-piperidin-2-yl)-ethyl]-pyridazine (CAS 1316225-99-6)
- Tau Peptide (274-288) trifluoroacetate salt (CAS 330456-39-8)
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