Ethyl 5-bromo-1-(2-chlorophenyl)-1H-pyrazole-3-carboxylate CAS 1269293-45-9
| CAS No. | 1269293-45-9 |
| Molecular Formula | C12H10BrClN2O2 |
| Molecular Weight | 329.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Ethyl 5-bromo-1-(2-chlorophenyl)-1H-pyrazole-3-carboxylate (C12H10BrClN2O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine/bromine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Ethyl 5-bromo-1-(2-chlorophenyl)-1H-pyrazole-3-carboxylate (CAS 1269293-45-9), molecular formula C12H10BrClN2O2 and molecular weight 329.58 g/mol, is a CATO reference standard with documented purity and traceability.
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 Ethyl 5-bromo-1-(2-chlorophenyl)-1H-pyrazole-3-carboxylate 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.
Physical & Chemical Properties
| Molecular Formula | C12H10BrClN2O2 |
| Molecular Weight | 329.58 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- Ethyl 5-bromo-1-(3-chlorophenyl)-1H-pyrazole-4-carboxylate (CAS 110821-39-1)
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Recommended Standards
- (2E)-3-(2-Chloro-6-fluorophenyl)-1-(3,4-dichlorophenyl)prop-2-en-1-one (CAS 1320361-75-8)
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