1-(2,4-Dimethylphenyl)-5-oxo-2,5-dihydro-1h-pyrazole-3-carboxylic acid CAS 1204296-99-0
| CAS No. | 1204296-99-0 |
| Molecular Formula | C12H12N2O3 |
| Molecular Weight | 232.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 232.24 g/mol gives 1-(2,4-Dimethylphenyl)-5-oxo-2,5-dihydro-1h-pyrazole-3-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1-(2,4-Dimethylphenyl)-5-oxo-2,5-dihydro-1h-pyrazole-3-carboxylic acid (CAS 1204296-99-0), molecular formula C12H12N2O3 and molecular weight 232.24 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C12H12N2O3, 1-(2,4-Dimethylphenyl)-5-oxo-2,5-dihydro-1h-pyrazole-3-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 232.24 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).
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.
As a certified reference material (CRM), 1-(2,4-Dimethylphenyl)-5-oxo-2,5-dihydro-1h-pyrazole-3-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 | C12H12N2O3 |
| Molecular Weight | 232.24 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 DMSO, DMF, methanol |
| 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 | 2 |
Related Dimethylphenyl Standards
- 1-(2,3-Dimethylphenyl)-4-hydroxy-1h-pyrazole-3-carboxylic acid (CAS 1152601-77-8)
- 1-(2,4-Dimethylphenyl)-5-oxo-4,5-dihydro-1h-pyrazole-4-carboxylic acid (CAS 1204297-52-8)
- 1-(3,4-Dimethylphenyl)-5-oxo-4,5-dihydro-1h-pyrazole-4-carboxylic acid (CAS 1204298-03-2)
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- Methyl 3-(5-phenyl-1,2,4-oxadiazol-3-yl)propanoate (CAS 1196463-32-7)
- Ethyl 2-(5-phenyl-1,2,4-oxadiazol-3-yl)acetate (CAS 1208081-35-9)
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- 6-Amino-1-benzyl-5-(N-formyl-N-methyl)uracil 72816-89-8 N-[6-Amino-1,2,3,4-tetrahydro-2,4-dioxo-1-(phenylmethyl)-5-pyrimidinyl]-N-methyl-formamide (CAS 72816-89-8)
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