4-chloro-3,5-bis[4-(difluoromethoxy)phenyl]-1h-pyrazole CAS 1239479-63-0
| CAS No. | 1239479-63-0 |
| Molecular Formula | C17H11ClF4N2O2 |
| Molecular Weight | 386.73 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-chloro-3,5-bis[4-(difluoromethoxy)phenyl]-1h-pyrazole is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-chloro-3,5-bis[4-(difluoromethoxy)phenyl]-1h-pyrazole (CAS 1239479-63-0) is a high-purity analytical reference standard with the molecular formula C17H11ClF4N2O2 and a molecular weight of 386.73 g/mol.
Based on its molecular formula C17H11ClF4N2O2, 4-chloro-3,5-bis[4-(difluoromethoxy)phenyl]-1h-pyrazole 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 386.73 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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-3,5-bis[4-(difluoromethoxy)phenyl]-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.
Physical & Chemical Properties
| Molecular Formula | C17H11ClF4N2O2 |
| Molecular Weight | 386.73 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 2 |
Related chloro Standards
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- 4-[3-Chloro-5-(trifluoromethyl)pyridin-2-yl]-N-[(ethylcarbamoyl)amino]benzamide (CAS 1092343-40-2)
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Recommended Standards
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- 1-(Dodecylsulfinyl)dodecane (CAS 2168-96-9)
- 4-Nitrobenzyl (3-chloro-1,4-dioxo-1,4-dihydronaphthalen-2-yl)carbamate (CAS 439093-98-8)
- 2-(Aminomethyl)-6-cyano-4-(difluoromethyl)pyridine-3-acetic acid (CAS 1804700-85-3)
- 2-(2-Methoxyethoxy)phenylboronic Acid (CAS 1122568-09-5)
- 6-Hydroxy-2-methylindole (CAS 54584-22-4)
- 1-Propyl-3-(trifluoromethyl)benzene (CAS 41320-75-6)
- Racecadotril Impurity 18 (CAS CATO-C4X-110618)
- 5-(Benzo[c][1,2,5]oxadiazol-5-yl)-N-cyclopentyl-2-methylpyrimidin-4-amine (CAS 917896-19-6)
- Methyl 2-(benzo[d][1,3]dioxol-5-yl)-4-(4-fluorophenyl)-4-oxobutanoate (CAS 329701-58-8)
- Triisopropylphosphonium tetrafluoroborate (CAS 121099-07-8)
- 65104-06-5 Diammonium dihydroxybis(lactato(2-)-O1,O2)titanate(2-) Titanate(2-), dihydroxybis(2-(hydroxy-kappaO)propanoato(2-)-kappaO)-, ammonium (1:2) Titanate(2-), dihydroxybis(2-(hydroxy-kappaO)propanoato(2-)-kappaO)-, diammonium Dihydroxybis(ammonium lactato)titanium EINECS 265-409-0 (CAS 65104-06-5)
- Semaglutide impurity 199 (CAS CATO-C4X-2226199)
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