(4E)-3-Methyl-4-[(3-phenoxyphenyl)methylidene]-1-phenyl-4,5-dihydro-1H-pyrazol-5-one CAS 297142-64-4
| CAS No. | 297142-64-4 |
| Molecular Formula | C23H18N2O2 |
| Molecular Weight | 354.40 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies (4E)-3-Methyl-4-[(3-phenoxyphenyl)methylidene]-1-phenyl-4,5-dihydro-1H-pyrazol-5-one (CAS 297142-64-4), a certified reference material (molecular formula C23H18N2O2, MW 354.40 g/mol) for analytical method development and quality control.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, (4E)-3-Methyl-4-[(3-phenoxyphenyl)methylidene]-1-phenyl-4,5-dihydro-1H-pyrazol-5-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 354.40 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
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 | C23H18N2O2 |
| Molecular Weight | 354.40 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 2 |
Recommended Standards
- (2R,5S,10aS,10bS)-Octahydro-10b-hydroxy-5-isobutyl-2-isopropyl-3,6-dioxo-8H-oxazolo[3,2-α]pyrrolo[2,1-c]pyrazine-2-carboxylic Acid (CAS 24177-07-9)
- (4Z)-4-[(4-Methoxyphenyl)methylidene]-1,3-diphenyl-4,5-dihydro-1H-pyrazol-5-one (CAS 39143-17-4)
- ((Methylsulfinyl)(phenyl)methyl)diphenylphosphine oxide (CAS 87763-01-7)
- (6,7-Dimethoxyisoquinolin-1-yl)(3,4-dimethoxyphenyl)methanamine (CAS 39964-73-3)
- 1-(3-(Thiophen-2-yl)phenyl)ethan-1-one (CAS 35216-03-6)
- 2-(3-Chloro-5-fluorophenyl)ethan-1-ol (CAS 842123-84-6)
- 2-Chloro-5-(difluoromethyl)-3-iodopyridine (CAS 1804703-99-8)
- Methyl 3-amino-1H-pyrrolo[3,2-b]pyridine-5-carboxylate (CAS 1190318-65-0)
- 3,5-Difluoro-2-methyl-4-propoxyphenylboronic acid (CAS 2096339-21-6)
- 21-Dehydro Flumethasone (CAS 65751-65-7)
- 2-Methoxy-6-oxo-1,6-dihydropyrimidine-5-carbonitrile (CAS 6971-62-6)
- 2,4-Dibromo-5-methylbenzotrifluoride (CAS 231285-88-4)
- (4-(O-tolyl)tetrahydro-2H-pyran-4-yl)methanamine (CAS 1083300-56-4)
- Semaglutide Impurity 177 (CAS CATO-C4X-2226177)
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