2,4-Dimethyl-5-oxo-1-phenyl-2,5-dihydro-1h-pyrazole-3-carbaldehyde CAS 91485-64-2
| CAS No. | 91485-64-2 |
| Molecular Formula | C12H12N2O2 |
| Molecular Weight | 216.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,4-Dimethyl-5-oxo-1-phenyl-2,5-dihydro-1h-pyrazole-3-carbaldehyde (CAS 91485-64-2), molecular formula C12H12N2O2 and molecular weight 216.24 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2,4-Dimethyl-5-oxo-1-phenyl-2,5-dihydro-1h-pyrazole-3-carbaldehyde (C12H12N2O2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), 2,4-Dimethyl-5-oxo-1-phenyl-2,5-dihydro-1h-pyrazole-3-carbaldehyde 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 | C12H12N2O2 |
| Molecular Weight | 216.24 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.) | 1983 |
| Nitrogen Atoms | 2 |
Related Dimethyl Standards
- 1,3-Dimethyl-5-phenoxy-1H-pyrazole-4-carbaldehyde (CAS 109925-10-2)
- 1,5-Dimethyl-3-phenyl-1H-pyrazole-4-carboxylic acid (CAS 1171501-41-9)
- 3,5-Dimethyl-2-(1H-pyrazol-1-yl)benzoic acid (CAS 1214622-50-0)
- 3,4-Dimethyl-2-(1H-pyrazol-1-yl)benzoic acid (CAS 1214622-51-1)
- 3-(3,5-Dimethyl-4-pyrazolyl)benzoic Acid (CAS 1229025-67-5)
- 6-(2,5-Dimethyl-1H-pyrrol-1-yl)nicotinic acid (CAS 1242997-26-7)
- 4-(4,5-Dimethyl-1H-imidazol-1-yl)benzoic acid (CAS 1251253-26-5)
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Recommended Standards
- 2,4-Dimethoxy-5-phenylpyrimidine (CAS 685866-81-3)
- 2,5-Dimethoxybenzene-1,4-diacetonitrile (CAS 38439-93-9)
- 2,3,4,5-Tetrahydro-1h-pyrido[4,3-b]indole-8-carboxylic acid (CAS 929345-60-8)
- 2,5-Dimethyl-1-(pyridin-3-yl)-1h-pyrrole-3-carboxylic acid (CAS 953717-57-2)
- {4-[2-(4-Benzylpiperazino)ethoxy]phenyl}methanol (CAS 937604-12-1)
- methyl 5-methyl-4-nitro-1H-pyrazole-3-carboxylate (CAS 27116-86-5)
- 1,4-dimethylanthracene-9,10-dione (CAS 1519-36-4)
- 5,6-dibromopyridine-3-sulfonyl chloride (CAS 1261883-41-3)
- Quetiapine impurity 69 (CAS 1216996-50-7（free base）)
- 5-((3-Methylbenzyl)thio)-1H-1,2,4-triazol-3-amine (CAS 496033-62-6)
- 2-Isocyanato-2-methylpropanoic acid methyl ester (CAS 54213-21-7)
- Bis(2-phenylethyl)amine (CAS 6308-98-1)
- 4-Methanesulfonyl-morpholine-3-carboxylic acid (CAS 1316217-87-4)
- Semaglutide impurity 206 (CAS CATO-C4X-2226206)
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