| CAS No. | 1783749-68-7 |
| Molecular Formula | C5H4BrF3N2 |
| Molecular Weight | 229.00 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 229.00 g/mol gives 5-Bromo-1-methyl-4-(trifluoromethyl)-1H-pyrazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-Bromo-1-methyl-4-(trifluoromethyl)-1H-pyrazole (CAS 1783749-68-7) is a high-purity analytical reference standard with the molecular formula C5H4BrF3N2 and a molecular weight of 229.00 g/mol.
Based on its molecular formula C5H4BrF3N2, 5-Bromo-1-methyl-4-(trifluoromethyl)-1H-pyrazole contains a nitrile group, fluorine/bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 229.00 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures 5-Bromo-1-methyl-4-(trifluoromethyl)-1H-pyrazole under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
| Molecular Formula | C5H4BrF3N2 |
| Molecular Weight | 229.00 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.) | 1994 |
| Halogen Content | F/Br-containing |
| Nitrogen Atoms | 2 |