3-(4-Chlorophenyl)-N-(2,4-difluorophenyl)-4-oxo-3,4-dihydrophthalazine-1-carboxamide CAS 320417-63-8
| CAS No. | 320417-63-8 |
| Molecular Formula | C21H12ClF2N3O2 |
| Molecular Weight | 411.79 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
3-(4-Chlorophenyl)-N-(2,4-difluorophenyl)-4-oxo-3,4-dihydrophthalazine-1-carboxamide (CAS 320417-63-8) is a high-purity analytical reference standard with the molecular formula C21H12ClF2N3O2 and a molecular weight of 411.79 g/mol.
Based on its molecular formula C21H12ClF2N3O2, 3-(4-Chlorophenyl)-N-(2,4-difluorophenyl)-4-oxo-3,4-dihydrophthalazine-1-carboxamide contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 411.79 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures 3-(4-Chlorophenyl)-N-(2,4-difluorophenyl)-4-oxo-3,4-dihydrophthalazine-1-carboxamide under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H12ClF2N3O2 |
| Molecular Weight | 411.79 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
- 1,2-Bis(2-bromophenyl)ethane (CAS 59485-34-6)
- Toxaphene (CAS 8001-35-2)
- 6-Chloro-7-deaza-9-(2,3,5-tri-O-acetyl-β-D-ribofuranoysyl)purine (CAS 16754-79-3)
- Clozapine Impurity 21 (CAS CATO-C4X-134021)
- 2-Fluoro-6-(prop-1-yn-1-yl)pyridine (CAS 143651-24-5)
- 4-Amino-1-fluorocyclohexane-1-carboxylic acid (CAS 1427378-61-7)
- tert-Butyl (2S,4R)-4-(tert-butoxy)-2-formylpyrrolidine-1-carboxylate (CAS 2348282-31-3)
- N-(((9H-fluoren-9-yl)methoxy)carbonyl)-O-((R)-2-hydroxypropyl)-N-methyl-L-serine (CAS 2255322-31-5)
- 2-bromo-7-methoxy-5-methylpyrazolo[1,5-a]pyridine (CAS 1427439-11-9)
- 2-Chloronicotinimidamide (CAS 473464-13-0)
- ethyl (5E,8Z,11Z,14E,17Z)-icosa-5,8,11,14,17-pentaenoate (CAS CATO-C4X-289027)
- 2-(Aminomethyl)-3-cyano-6-(difluoromethyl)-4-nitropyridine (CAS 1805519-99-6)
- 3,4-Dichloro-n-methoxy-n-methylbenzenesulfonamide (CAS 923679-89-4)
- Semaglutide Impurity 190 (CAS CATO-C4X-2226190)
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