| CAS No. | 918339-63-6 |
| Molecular Formula | C11H8BrF3N2O |
| Molecular Weight | 321.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 321.09 g/mol gives 4-Bromo-1-(4-methoxyphenyl)-5-(trifluoromethyl)-1H-pyrazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Bromo-1-(4-methoxyphenyl)-5-(trifluoromethyl)-1H-pyrazole (CAS 918339-63-6) is a high-purity analytical reference standard with the molecular formula C11H8BrF3N2O and a molecular weight of 321.09 g/mol.
4-Bromo-1-(4-methoxyphenyl)-5-(trifluoromethyl)-1H-pyrazole (C11H8BrF3N2O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine/bromine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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-Bromo-1-(4-methoxyphenyl)-5-(trifluoromethyl)-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.
| Molecular Formula | C11H8BrF3N2O |
| Molecular Weight | 321.09 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | F/Br-containing |
| Nitrogen Atoms | 2 |