4-bromo-3-(difluoromethyl)-1-methyl-pyrazole CAS 1089212-38-3
| CAS No. | 1089212-38-3 |
| Molecular Formula | C5H9BrF2N2 |
| Molecular Weight | 215.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-bromo-3-(difluoromethyl)-1-methyl-pyrazole is closely related to fluorine/bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-bromo-3-(difluoromethyl)-1-methyl-pyrazole (CAS 1089212-38-3) is a high-purity analytical reference standard with the molecular formula C5H9BrF2N2 and a molecular weight of 215.04 g/mol.
The molecular framework of 4-bromo-3-(difluoromethyl)-1-methyl-pyrazole (C5H9BrF2N2) is characterized by fluorine/bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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.
Physical & Chemical Properties
| Molecular Formula | C5H9BrF2N2 |
| Molecular Weight | 215.04 g/mol |
| 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 | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | F/Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
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- 2-(Aminomethyl)-6-(difluoromethyl)-3-(trifluoromethyl)pyridin-4-amine (CAS 1806825-44-4)
- 1020718-63-1 2-Methyl-7-methylamino-d3-8-nitro-quinoxaline 3-methyl-5-nitro-N-(trideuteriomethyl)quinoxalin-6-amine (CAS 1020718-63-1)
- 2-Fluoro-6-(prop-1-yn-1-yl)pyridine (CAS 143651-24-5)
- 1,3-Dimethyl-4-(m-tolyl)-1h-pyrazol-5-amine (CAS 1260805-55-7)
- 3-Methyl-4-(thiophene-2-amido)benzoic acid (CAS 827002-04-0)
- 1-(Pyridin-2-yl)octan-1-amine (CAS 1250009-82-5)
- Peptide Impurity 82 (CAS 10491-78-8)
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