4-Oxo-2-pyrimidin-2-yl-1H-pyrimidine-6-carboxylic acid CAS 1261079-77-9
| CAS No. | 1261079-77-9 |
| Molecular Formula | C9H6N4O3 |
| Molecular Weight | 218.17 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.
4-Oxo-2-pyrimidin-2-yl-1H-pyrimidine-6-carboxylic acid (CAS 1261079-77-9), molecular formula C9H6N4O3 and molecular weight 218.17 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Oxo-2-pyrimidin-2-yl-1H-pyrimidine-6-carboxylic acid (C9H6N4O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 218.17 g/mol, it falls into the medium-molecular-weight range. 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 | C9H6N4O3 |
| Molecular Weight | 218.17 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 4 |
Related Oxo Standards
- 6-Oxo-2-(pyrimidin-4-yl)-1,6-dihydropyrimidine-5-carboxylic acid (CAS 1342973-32-3)
- Ethyl 1-(pyrimidin-4-yl)-1H-pyrazole-4-carboxylate (CAS 1014632-04-2)
- Ethyl 1-(pyrimidin-4-yl)-1H-imidazole-4-carboxylate (CAS 1389313-33-0)
- 2-(Pyrimidin-5-yl)-2,7-diazaspiro[4.4]nonan-3-one (CAS 1422067-43-3)
- 1-Methyl-7-(pyrimidin-5-yl)-1,7-diazaspiro[4.4]nonane (CAS 646056-23-7)
- 7-Methyl-1-(pyrimidin-5-yl)-1,7-diazaspiro[4.4]nonane (CAS 646056-37-3)
- 4-Pyrimidin-2-ylbenzoyl chloride (CAS 679806-84-9)
- 2-[(pyrimidin-2-ylsulfanyl)methyl]aniline (CAS 1019613-83-2)
Recommended Standards
- Ethyl 2-(2,3,5-trifluorophenyl)acetate (CAS 1256479-84-1)
- 1-(4-(Difluoromethoxy)-2-fluorophenyl)propan-1-one (CAS 1261453-51-3)
- Ethyl 2-(2,3,4-trifluorophenyl)acetate (CAS 1256479-43-2)
- 1-[2-hydroxy-4-(trifluoromethyl)phenyl]propan-1-one (CAS 1261680-31-2)
- N-(7-Methylbenzo[1,2-d:3,4-d']bis(thiazole)-2-yl)pyrazine-2-carboxamide (CAS 1206989-34-5)
- (2-(Pyrrolidin-2-yl)pyridin-3-yl)boronic acid hydrochloride (CAS 2096334-89-1)
- N-(furan-2-ylmethyl)-3-(2-mercapto-1H-imidazol-1-yl)benzamide (CAS 1223880-14-5)
- Peptide 432 (CAS CATO-CPTD788432)
- Furosemide Impurity 29 (CAS 4795-29-3)
- (6-(Cyclopropylamino)-4-methylpyridin-3-yl)(phenyl)methanone (CAS 1355215-32-5)
- Kanamycin Sulfate (CAS 70560-51-9)
- N-(4-Bromo-2-methylphenyl)-3-methylbenzamide (CAS 349397-95-1)
- 5-Ethyl-3-methoxy-2-methylpyrazine (CAS 134079-38-2)
- (Gly1,Ser3·22,Gln?·3?,Thr?,Arg1?,Tyr21,Ala23·31,Aib32)-Pancreatic Polypeptide (human) (CAS 313988-89-5)
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