3-(4-Chlorophenyl)-1-(3-nitrophenyl)-5-phenyl-4,5-dihydro-1H-pyrazole CAS 343374-72-1
| CAS No. | 343374-72-1 |
| Molecular Formula | C21H16ClN3O2 |
| Molecular Weight | 377.82 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-(4-Chlorophenyl)-1-(3-nitrophenyl)-5-phenyl-4,5-dihydro-1H-pyrazole 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.
3-(4-Chlorophenyl)-1-(3-nitrophenyl)-5-phenyl-4,5-dihydro-1H-pyrazole (CAS 343374-72-1) is a high-purity analytical reference standard with the molecular formula C21H16ClN3O2 and a molecular weight of 377.82 g/mol.
Based on its molecular formula C21H16ClN3O2, 3-(4-Chlorophenyl)-1-(3-nitrophenyl)-5-phenyl-4,5-dihydro-1H-pyrazole contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 377.82 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H16ClN3O2 |
| Molecular Weight | 377.82 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
- 2-{[5-chloro-1-(4-methoxyphenyl)-6-oxo-1,6-dihydropyridazin-4-yl](methyl)amino}ethyl cyclopropanecarboxylate (CAS 477867-34-8)
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- 1-Chloro-8-((4-ethoxyphenyl)amino)anthracene-9,10-dione (CAS 848679-23-2)
- Ronifibrate - API Standards (CAS 42597-57-9)
- 2-(4-Amino-1,2,5-oxadiazol-3-yl)acetamide (CAS 383881-15-0)
- 4-(Chloromethyl)-2-(2-methoxyphenyl)thiazole (CAS 129486-80-2)
- (s)-1-(Pyrimidin-2-yl)piperidin-3-amine dihydrochloride (CAS 1439894-62-8)
- 2-((2-Methoxy-5-methylphenyl)amino)acetamide (CAS 923256-20-6)
- 5,7-Octadien-2-ol, 2,6-dimethyl- (CAS 5986-38-9)
- 3-(4-iodo-1-oxo-isoindolin-2-yl)piperidine-2,6-dione (CAS 2207541-30-6)
- N-(4-Acetylphenyl)-2-(pyrrolidin-1-yl)acetamide (CAS 406930-20-9)
- 4-Iodo-3-methylbenzophenone (CAS 951887-39-1)
- Adenosine 5-diphosphate trilithium salt (CAS 31008-64-7)
- (Ser(PO3H2)202,Thr(PO3H2)205)-Tau Peptide (194-213) trifluoroacetate salt (CAS 2022956-55-2)
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