Methyl 5-(1-(2-chlorophenyl)-3-(ethoxycarbonyl)-1H-pyrazol-4-yl)-3-(2,6-dichlorophenyl)isoxazole-4-carboxylate CAS 321571-33-9
| CAS No. | 321571-33-9 |
| Molecular Formula | C23H16Cl3N3O5 |
| Molecular Weight | 520.75 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Methyl 5-(1-(2-chlorophenyl)-3-(ethoxycarbonyl)-1H-pyrazol-4-yl)-3-(2,6-dichlorophenyl)isoxazole-4-carboxylate is closely related to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Methyl 5-(1-(2-chlorophenyl)-3-(ethoxycarbonyl)-1H-pyrazol-4-yl)-3-(2,6-dichlorophenyl)isoxazole-4-carboxylate (CAS 321571-33-9), molecular formula C23H16Cl3N3O5 and molecular weight 520.75 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C23H16Cl3N3O5, Methyl 5-(1-(2-chlorophenyl)-3-(ethoxycarbonyl)-1H-pyrazol-4-yl)-3-(2,6-dichlorophenyl)isoxazole-4-carboxylate contains a flavonoid 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 520.75 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).
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), Methyl 5-(1-(2-chlorophenyl)-3-(ethoxycarbonyl)-1H-pyrazol-4-yl)-3-(2,6-dichlorophenyl)isoxazole-4-carboxylate 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 | C23H16Cl3N3O5 |
| Molecular Weight | 520.75 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 | Cl-containing |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- Methyl 3-(2-chlorophenyl)-5-(1-(2,4-dichlorophenyl)-3-(ethoxycarbonyl)-1H-pyrazol-4-yl)isoxazole-4-carboxylate (CAS 321571-31-7)
- Methyl 5-[1-(3-chlorophenyl)-3-(ethoxycarbonyl)-1H-pyrazol-4-yl]-3-(2,6-dichlorophenyl)-1,2-oxazole-4-carboxylate (CAS 321571-37-3)
- (R)-2-[[4-chlorophenyl)sulfonyl][[2-fluoro-4-(1,2,4-oxadiazol-3-yl)phenyl]methyl]amino]-5,5,5-trifluoropentanamide (CAS 1146699-66-2)
- 2-(4-(3-Chlorophenyl)piperazin-1-yl)-N-(4-((2,4-dichlorobenzyl)thio)phenyl)acetamide (CAS 329779-63-7)
- 5-[(4-Chlorophenyl)sulfanyl]-4-(2,4-dichlorophenyl)-2-[5-(thiophen-2-yl)-1H-pyrazol-1-yl]-1,3-thiazole (CAS 956182-65-3)
- 1-{5-[(4-chlorophenyl)sulfanyl]-4-(4-methoxyphenyl)-1,3-thiazol-2-yl}-4-(4-methoxyphenyl)-1H-pyrazol-5-amine (CAS 956977-32-5)
- 2-((4-(2-Chlorophenyl)-6-(4-chlorophenyl)-3-cyanopyridin-2-yl)thio)-N-(4-methoxyphenyl)acetamide (CAS 337936-16-0)
- 4-({[(4-chlorophenyl)methyl]sulfanyl}methyl)-6-[4-(3-chlorophenyl)piperazin-1-yl]-2-phenylpyrimidine (CAS 338967-29-6)
Recommended Standards
- (5-((4-Bromophenyl)thio)-1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)methyl (4-chlorophenyl)carbamate (CAS 318239-62-2)
- 1-(2-Aminoethyl)-3-(4-(hydroxy((1,1,4,4,5,5,8,8-octamethyl-1,2,3,4,5,6,7,8-octahydroanthracen-9-yl)amino)methyl)phenyl)urea (CAS CATO-C3D-262694)
- N-[(4-Methylphenyl)methyl]-6-[4-(5-{[(4-methylphenyl)methyl]carbamoyl}pentyl)piperazin-1-yl]hexanamide (CAS 1424350-54-8)
- Dronedarone Impurity 97 (CAS CATO-C4X-109297)
- N-(1-isopropoxyethyl)acetamide (CAS 115910-75-3)
- 2-(3,4-Difluorophenoxy)-5-fluoronicotinic acid (CAS 1157093-09-8)
- (4-((2,4-Dichlorobenzyl)oxy)-3-ethoxyphenyl)methanol (CAS 401827-46-1)
- Methyl 6-(4-(difluoromethoxy)phenyl)-3-methyl-1-phenyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (CAS 1011399-93-1)
- Levofloxacin Impurity 22 (CAS 82419-46-3)
- Ethyl 2-(4-isopropylphenyl)thiazole-4-carboxylate (CAS 886368-07-6)
- Ethyl 2-fluoro-3-methylbut-2-enoate (CAS 685-89-2)
- (6-Bromopyridin-2-yl)-tributylstannane (CAS 189083-81-6)
- 4-(1-Isobutyrylpiperidin-4-yl)benzoic acid (CAS 777874-76-7)
- Insulin Detemir (CAS 169148-63-4)
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