Ethyl 5-Bromo-1-methylpyrazole-4-carboxylate CAS 105486-72-4
| CAS No. | 105486-72-4 |
| Molecular Formula | C7H9BrN2O2 |
| Molecular Weight | 233.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 233.06 g/mol gives Ethyl 5-Bromo-1-methylpyrazole-4-carboxylate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Ethyl 5-Bromo-1-methylpyrazole-4-carboxylate (CAS 105486-72-4), molecular formula C7H9BrN2O2 and molecular weight 233.06 g/mol, is a CATO reference standard with documented purity and traceability.
Ethyl 5-Bromo-1-methylpyrazole-4-carboxylate (C7H9BrN2O2) 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C7H9BrN2O2 |
| Molecular Weight | 233.06 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.) | 1987 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- Methyl 2-(4-bromo-1h-pyrazol-1-yl)propanoate (CAS 1005566-07-3)
- 2-(4-bromo-1H-pyrazol-1-yl)butanoic acid (CAS 1005697-69-7)
- 3-(4-Bromo-1-methyl-1H-pyrazol-3-yl)propanoic acid (CAS 1006440-27-2)
- 3-(4-Bromo-1-methyl-1h-pyrazol-5-yl)propanoic acid (CAS 1006440-31-8)
- 4-Bromo-1-(propan-2-yl)-1h-pyrazole-3-carboxylic acid (CAS 1006451-37-1)
- 4-Bromo-1-propyl-1h-pyrazole-5-carboxylic acid (CAS 1006457-27-7)
- 4-Bromo-1-(propan-2-yl)-1H-pyrazole-5-carboxylic acid (CAS 1006493-98-6)
- Methyl 3-(4-bromo-1H-pyrazol-1-yl)propanoate (CAS 1007517-46-5)
Recommended Standards
- 4-Bromoquinoline-8-carbonitrile (CAS 1020743-28-5)
- 6-Bromoisoquinoline-1-carbonitrile (CAS 1082674-24-5)
- 3-(4-Bromo-1h-pyrazol-1-yl)butanoic acid (CAS 1007517-56-7)
- 8-Bromoisoquinoline-1-carbonitrile (CAS 1082734-33-5)
- Ethyl 5,7-dimethyl-1-oxaspiro[2.5]octane-2-carboxylate (CAS 1561483-17-7)
- N-(2-(5,8-Dimethoxy-2-oxo-1,2-dihydroquinolin-3-yl)ethyl)cyclopropanecarboxamide (CAS 851403-52-6)
- 2-Ethyl-3-isopropylquinazolin-4(3H)-one (CAS 49739-17-5)
- 5-Chloro-2-trifluoromethylpyrazine 2-Chloro-5-(trifluoromethyl)pyrazine 799557-87-2 (CAS 799557-87-2)
- Methyl 2-amino-3-(1h-pyrrolo[2,3-b]pyridin-3-yl)propanoate (CAS 159911-75-8)
- 2-(4-(Difluoromethyl)-3-methyl-5-nitropyridin-2-yl)acetonitrile (CAS 1805467-63-3)
- 1,3-Benzodioxole-N-phthalimido DL-threo-Droxidopa-13C2,15N (CAS 1330188-86-7)
- 2-amino-3H-imidazo[4,5-b]pyridine-5-carboxylic acid (CAS 1934520-59-8)
- 3,5-Diethyl 4-(4-methoxyphenyl)-2,6-dimethylpyridine-3,5-dicarboxylate (CAS 5448-05-5)
- Amyloid Precursor Frameshift Mutant C-Terminal Peptide trifluoroacetate salt (CAS 189125-14-2)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com