3,4-Dibromo-5-(trifluoromethyl)-1H-pyrazole CAS 19968-15-1
| CAS No. | 19968-15-1 |
| Molecular Formula | C4HBr2F3N2 |
| Molecular Weight | 293.87 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 293.87 g/mol gives 3,4-Dibromo-5-(trifluoromethyl)-1H-pyrazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3,4-Dibromo-5-(trifluoromethyl)-1H-pyrazole (CAS 19968-15-1) is a high-purity analytical reference standard with the molecular formula C4HBr2F3N2 and a molecular weight of 293.87 g/mol.
Owing to a nitrile group, fluorine/bromine substitution, 3,4-Dibromo-5-(trifluoromethyl)-1H-pyrazole is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 293.87 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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), 3,4-Dibromo-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.
Physical & Chemical Properties
| Molecular Formula | C4HBr2F3N2 |
| Molecular Weight | 293.87 g/mol |
| Appearance | 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | F/Br-containing |
| Nitrogen Atoms | 2 |
Related Dibromo Standards
- 2,4-Dibromo-5-(trifluoromethyl)-1H-imidazole (CAS 81654-02-6)
- 3,5-Dibromo-4-(trifluoromethyl)-1H-pyrazole (CAS 2641467-69-6)
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- 3,6-Dibromo-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one (CAS 96555-36-1)
- 3,6-Dibromo-8-fluoroimidazo[1,2-a]pyridine (CAS 1260817-61-5)
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