Methyl 4-bromo-1-methyl-1H-pyrazole-3-carboxylate CAS 211738-66-8
| CAS No. | 211738-66-8 |
| Molecular Formula | C6H7BrN2O2 |
| Molecular Weight | 219.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Methyl 4-bromo-1-methyl-1H-pyrazole-3-carboxylate (CAS 211738-66-8) is a high-purity analytical reference standard with the molecular formula C6H7BrN2O2 and a molecular weight of 219.04 g/mol.
Methyl 4-bromo-1-methyl-1H-pyrazole-3-carboxylate (C6H7BrN2O2) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 | C6H7BrN2O2 |
| Molecular Weight | 219.04 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2017 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
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- Methyl 4-bromo-5-methyl-1H-imidazole-2-carboxylate (CAS 2092027-08-0)
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- 1-(2-Methoxyphenyl)-1H-imidazole-2-thiol (CAS 51581-48-7)
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- 2-({2-[(4-Chlorophenyl)thio]ethyl}amino)ethanol hydrochloride (CAS 434312-01-3)
- N-((1-ethyl-2-oxo-1,2,3,4-tetrahydroquinoline-3-carbonyl)oxy)acetamide (CAS 2306278-60-2)
- 1-[(3-bromothiophen-2-yl)methyl]-4-nitro-1h-pyrrole-2-carboxylic acid (CAS 1283936-37-7)
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- (2,4-Dichloro-5-fluorophenyl)methanol (CAS 219765-56-7)
- Polyphemusin II-Derived Peptide (CAS 229030-20-0)
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