1-(3,4-Dichlorophenyl)-3-(4-fluorophenyl)-5-(2,3,4-trimethoxyphenyl)-4,5-dihydro-1H-pyrazole CAS 329778-82-7
| CAS No. | 329778-82-7 |
| Molecular Formula | C24H21Cl2FN2O3 |
| Molecular Weight | 475.34 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 1-(3,4-Dichlorophenyl)-3-(4-fluorophenyl)-5-(2,3,4-trimethoxyphenyl)-4,5-dihydro-1H-pyrazole (CAS 329778-82-7), a certified reference material (molecular formula C24H21Cl2FN2O3, MW 475.34 g/mol) for analytical method development and quality control.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, 1-(3,4-Dichlorophenyl)-3-(4-fluorophenyl)-5-(2,3,4-trimethoxyphenyl)-4,5-dihydro-1H-pyrazole is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 475.34 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
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 | C24H21Cl2FN2O3 |
| Molecular Weight | 475.34 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichlorophenyl Standards
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Recommended Standards
- tert-Butyl (S)-4,4-difluoro-2-(5-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate (CAS 1007882-13-4)
- (2R,3R,4R,5R)-4-hydroxy-2-(2-iSobutyramido-6-oxo-1H-purin-9(6H)-yl)-5-((phosphonooxy)methyl)tetrahydrofuran-3-yl acetate (CAS 61561-83-9)
- CU3H37T766 99593-25-6 Rilmazafone Rilmazafone [INN] 5-((2-Aminoacetamido)methyl)-1-(4-chloro-2-(o-chlorobenzoyl)phenyl)-N,N-dimethyl-1H-1,2,4-triazole-3-carboxamide 1H-1,2,4-Triazole-3-carboxamide, 5-(((aminoacetyl)amino)methyl)-1-(4-chloro-2-(2-chlorobenzoyl)phenyl)-N,N-dimethyl- 1H-1,2,4-Triazole-3-carboxamide, 5-(((aminoacetyl)amino)methyl)-1-(4-chloro-2-(2-chlorobenzoyl)phenyl)-N,N-dimethyl-, monohydrochloride Rilmazafona [Spanish] Rilmazafonum [Latin] Rilmazafona Rilmazafonum UNII-CU3H37T766 (CAS 99593-25-6)
- 4,5-Dichloro-2-(1,1-dibromo-2-(4-chlorophenyl)-2-oxoethyl)pyridazin-3(2H)-one (CAS 320423-93-6)
- 2-Cyano-N-(3,4-dimethoxyphenyl)-3-(2-methoxyphenyl)propanamide (CAS 1260909-16-7)
- p-Nitrophenylhydrazine sulfate (CAS 58332-97-1)
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- 2,2'-(1,4-Phenylenebis(oxy))diacetic acid (CAS 2245-53-6)
- 1,3-Dichloro-6,7-dihydro-5H-cyclopenta[c]pyridine-4-carboxylic acid (CAS 34142-27-3)
- 3-(2-ethoxy-2-oxoethyl)-1-methyl-1H-imidazol-3-ium hexafluorophosphate(V) (CAS 503439-50-7)
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