4-Bromo-1-(4-chloro-2-fluorophenyl)-1H-pyrazole CAS 2379322-66-2
| CAS No. | 2379322-66-2 |
| Molecular Formula | C9H5BrClFN2 |
| Molecular Weight | 275.50 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
CATO supplies 4-Bromo-1-(4-chloro-2-fluorophenyl)-1H-pyrazole (CAS 2379322-66-2), a certified reference material (molecular formula C9H5BrClFN2, MW 275.50 g/mol) for analytical method development and quality control.
Based on its molecular formula C9H5BrClFN2, 4-Bromo-1-(4-chloro-2-fluorophenyl)-1H-pyrazole contains a nitrogen-containing heterocyclic scaffold, a nitrile group, fluorine/chlorine/bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 275.50 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.
Physical & Chemical Properties
| Molecular Formula | C9H5BrClFN2 |
| Molecular Weight | 275.50 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| 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.) | 1999 |
| Halogen Content | F/Cl/Br-containing |
| Nitrogen Atoms | 2 |
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Why CATO?
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