5-Bromo-3-(difluoromethyl)-1-methyl-1H-pyrazole CAS 2248389-97-9
| CAS No. | 2248389-97-9 |
| Molecular Formula | C5H5BrF2N2 |
| Molecular Weight | 211.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-Bromo-3-(difluoromethyl)-1-methyl-1H-pyrazole (CAS 2248389-97-9), a certified reference material (molecular formula C5H5BrF2N2, MW 211.01 g/mol) for analytical method development and quality control.
5-Bromo-3-(difluoromethyl)-1-methyl-1H-pyrazole (C5H5BrF2N2) contains a nitrile group, fluorine/bromine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), 5-Bromo-3-(difluoromethyl)-1-methyl-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 | C5H5BrF2N2 |
| Molecular Weight | 211.01 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.) | 1998 |
| Halogen Content | F/Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 4-Bromo-1-(2,2-difluoroethyl)-1H-pyrazole (CAS 1049730-36-0)
- 4-Bromo-5-(difluoromethyl)-1-methylpyrazole (CAS 1089212-57-6)
- 4-Bromo-1-(difluoromethyl)-3-methyl-1H-pyrazole (CAS 1215295-92-3)
- 4-Bromo-1-(difluoromethyl)-5-methyl-1H-pyrazole (CAS 1243250-04-5)
- 3-Bromo-1-(2,2-difluoroethyl)-1H-pyrazole (CAS 1849251-81-5)
- 5-Bromo-1-(2,2-difluoroethyl)-1H-pyrazole (CAS 1946823-81-9)
- 2-Bromo-3-methylsuccinic acid (CAS 7405-17-6)
- 2-Bromo-1-methyl-1H-imidazole-4,5-dicarbonitrile (CAS 115905-43-6)
Recommended Standards
- 3-(Bromomethyl)-1-(difluoromethyl)-1H-pyrazole (CAS 2435553-73-2)
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- 3-(Bromodifluoromethyl)-1-methyl-1H-pyrazole (CAS 2060041-54-3)
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- 4-Methyl-1-(1-phenylethyl)-1h-pyrazol-3-amine (CAS 1339417-79-6)
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