4,4-Dibenzyl-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one CAS 189109-70-4
| CAS No. | 189109-70-4 |
| Molecular Formula | C24H22N2O |
| Molecular Weight | 354.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,4-Dibenzyl-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one (CAS 189109-70-4), molecular formula C24H22N2O and molecular weight 354.44 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C24H22N2O, 4,4-Dibenzyl-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 354.44 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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), 4,4-Dibenzyl-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one 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 | C24H22N2O |
| Molecular Weight | 354.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2011 |
| Nitrogen Atoms | 2 |
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- 1-(2-Chloro-4-nitrophenyl)-3,5-dimethyl-1H-pyrazole (CAS 103862-71-1)
- Pantoprazole Impurity 13 (CAS 97963-75-2)
- 1-(4-(4-Chloro-3-methylphenoxy)phenyl)ethanone (CAS 129644-20-8)
- 4-(Thiophen-3-yl)morpholine (CAS 1006-76-4)
- 4,4-Bis(4-(quinolin-2-ylmethoxy)phenyl)cyclohexanecarboxylic acid (CAS 195050-52-3)
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