4-Chloro-5-(3,5-diphenyl-1H-pyrazol-1-yl)pyridazin-3(2H)-one CAS 94375-42-5
| CAS No. | 94375-42-5 |
| Molecular Formula | C19H13ClN4O |
| Molecular Weight | 348.79 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 4-Chloro-5-(3,5-diphenyl-1H-pyrazol-1-yl)pyridazin-3(2H)-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 348.79 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies 4-Chloro-5-(3,5-diphenyl-1H-pyrazol-1-yl)pyridazin-3(2H)-one (CAS 94375-42-5), a certified reference material (molecular formula C19H13ClN4O, MW 348.79 g/mol) for analytical method development and quality control.
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), 4-Chloro-5-(3,5-diphenyl-1H-pyrazol-1-yl)pyridazin-3(2H)-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 | C19H13ClN4O |
| Molecular Weight | 348.79 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; 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.) | 1983 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
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Recommended Standards
- 3-[1-(4-Chlorophenyl)-1H-pyrazol-3-yl]-1-phenyl-1,4-dihydropyridazin-4-one (CAS 318497-94-8)
- 5-(2-Amino-6-(4-chlorophenyl)pyrimidin-4-yl)quinolin-8-ol (CAS 833488-13-4)
- Disperse Red 13 (CAS 3180-81-2)
- Sivelestat Impurity 34 (CAS CATO-C4X-212334)
- Maleimide-PEG<SUB>6</SUB>-succinimidyl ester (CAS 1137109-21-7)
- 2-[(3,3,3-Trifluoropropyl)sulfonyl]acetic acid (CAS 1409839-17-3)
- 3-(5-Methyl-2-pyridyl)-1-propene (CAS 951887-10-8)
- Adefovir Impurity 12 (CAS 20245-85-6)
- 4-Fluoro-N-propylaniline (CAS 2806-12-4)
- 4,5-dibromo-1-ethyl-1H-imidazole-2-carbaldehyde (CAS 2060035-12-1)
- Methyl 4-bromo-6-methylpicolinate (CAS 886372-49-2)
- 2-Acetyl-5-nitropyrrole (CAS 32116-25-9)
- (S)-2-Amino-N-((S)-1-methylpyrrolidin-3-yl)propanamide (CAS 1401667-35-3)
- Semaglutide238 (CAS CATO-C4X-2226238)
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