1-(4-Chlorophenyl)-3-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)urea CAS 59440-79-8
| CAS No. | 59440-79-8 |
| Molecular Formula | C18H17ClN4O2 |
| Molecular Weight | 356.81 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C18H17ClN4O2, 1-(4-Chlorophenyl)-3-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)urea 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 356.81 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
1-(4-Chlorophenyl)-3-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)urea (CAS 59440-79-8) is a high-purity analytical reference standard with the molecular formula C18H17ClN4O2 and a molecular weight of 356.81 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 1-(4-Chlorophenyl)-3-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)urea 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 | C18H17ClN4O2 |
| Molecular Weight | 356.81 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related Chlorophenyl Standards
- (4Z)-1-(4-Chlorophenyl)-3-ethoxy-4-({[(pyridin-3-yl)methyl]amino}methylidene)-4,5-dihydro-1H-pyrazol-5-one (CAS 338751-19-2)
- 1-(3-Chlorophenyl)-3-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)urea (CAS 325850-26-8)
- 2-((4-(2-(2-Chlorophenyl)acetamido)but-2-yn-1-yl)oxy)benzamide (CAS 1421442-94-5)
- (E)-3-(5-(4-chlorophenyl)furan-2-yl)-2-cyano-N-((tetrahydrofuran-2-yl)methyl)acrylamide (CAS 444764-47-0)
- 4-(4-Chlorophenyl)-3-phenylisoxazolo[4,5-c]quinoline (CAS 253433-32-8)
- Ethyl 2-{3-[(4-chlorophenyl)methyl]-4-oxo-3,4-dihydrophthalazin-1-yl}acetate (CAS 866151-32-8)
- Ethyl 4-(4-chlorophenyl)-6-hydroxy-2-phenyl-4,5-dihydropyrimidine-5-carboxylate (CAS 400078-28-6)
- N-(2-chlorophenyl)-2-((4-fluorophenyl)sulfonamido)propanamide (CAS 317378-04-4)
Recommended Standards
- 2-((5-(5-Chlorothiophen-2-yl)-1,3,4-oxadiazol-2-yl)thio)-N-(5-methylisoxazol-3-yl)acetamide (CAS 850937-46-1)
- (R)-7-chloro-6-methoxy-4-((1-(pyridin-2-yl)ethyl)amino)quinoline-3-carboxamide (CAS 2444608-43-7)
- 3-Amino-N-(1-(2-chloro-4,6-dimethylphenyl)-5-oxo-4,5-dihydro-1H-pyrazol-3-yl)benzamide (CAS 88372-24-1)
- 4-Chloro-2-(4-methoxyphenyl)-5-{[2-(pyridin-2-yl)ethyl]amino}-2,3-dihydropyridazin-3-one (CAS 477867-44-0)
- 2,4-Dimethoxybenzothiazole (CAS 858635-78-6)
- Methyl 4-iodooxazole-5-carboxylate (CAS 1823503-38-3)
- 2,3-Dihydro-1-benzofuran-5-carbothioamide (CAS 306936-08-3)
- 4,9-Dioxa-1-azaspiro[5.5]undecan-5-one hydrochloride (CAS 2138271-62-0)
- 2-Methylindolizine (CAS 768-18-3)
- 2-Butyl-5-chlorobenzo[d]oxazole (CAS 866142-97-4)
- 5-(isocyanatomethyl)-3-methyl-1,2-oxazole (CAS 134517-52-5)
- 3-Methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxamide (CAS 1857101-88-2)
- 6-(4-Fluorophenoxy)-N-hydroxy-3-pyridinecarboximidamide (CAS 1017043-73-0)
- Semaglutide impurity 57 (CAS 2773558-06-6)
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