5-Methyl-2-(methylsulfonyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7(1H)-one CAS 90000-59-2
| CAS No. | 90000-59-2 |
| Molecular Formula | C7H8N4O3S |
| Molecular Weight | 228.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5-Methyl-2-(methylsulfonyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7(1H)-one (CAS 90000-59-2) is a high-purity analytical reference standard with the molecular formula C7H8N4O3S and a molecular weight of 228.23 g/mol.
5-Methyl-2-(methylsulfonyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7(1H)-one (C7H8N4O3S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, 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 | C7H8N4O3S |
| Molecular Weight | 228.23 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 5-Methyl-2-(methylsulfonyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol (CAS 40775-95-9)
- 2-(4-(Methylsulfonyl)phenyl)-2-oxoacetic acid (CAS 79478-01-6)
- 3-(4-(Methylsulfonyl)phenyl)propanoic acid (CAS 387350-46-1)
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- Methyl 3-(Methylsulfonyl)phenylacetate (CAS 847150-07-6)
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- 4-Methyl-5-(methylsulfonyl)-2-thioxo-1,2-dihydropyridine-3-carbonitrile (CAS 1447962-48-2)
Recommended Standards
- 5-methoxycarbonylpyrazolo[1,5-a]pyrimidine-7-carboxylate (CAS 916212-00-5)
- 4,4'-(2-Fluoro-1,4-phenylene)bis(1H-pyrazole) (CAS 2044270-00-8)
- 7-Methoxy-2H-benzo[e][1,2,4]thiadiazin-3(4H)-one 1,1-dioxide (CAS 71254-67-6)
- 4-(Carboxymethyl)-2-(methylthio)pyrimidine-5-carboxylic acid (CAS 2763157-29-3)
- Butyl Heptanoate (5 x 0.5 mL) (CAS 5454-28-4)
- 4-(4-Bromo-1h-pyrazol-3-yl)-1-ethyl-5-methyl-1h-pyrazole (CAS 1006341-00-9)
- 5-(4-Ethyl-phenoxymethyl)-4-(1-phenyl-ethyl)-4H-[1,2,4]triazole-3-thiol (CAS 748778-16-7)
- N-((1-Methyl-4,5,6,7-tetrahydro-1H-indazol-3-yl)methyl)-3-phenylacrylamide (CAS 1448139-69-2)
- Tert-butyl (R)-(1-phenylethyl)carbamate (CAS 184888-43-5)
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- Epiandrosterone acetate (CAS 1239-31-2)
- Des-Gln19-Tirzepatide (CAS CATO-CPTD788954)
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