3-Bromo-1-vinyl-1H-pyrazole CAS 923036-00-4
| CAS No. | 923036-00-4 |
| Molecular Formula | C5H5BrN2 |
| Molecular Weight | 173.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Bromo-1-vinyl-1H-pyrazole (CAS 923036-00-4), molecular formula C5H5BrN2 and molecular weight 173.01 g/mol, is a CATO reference standard with documented purity and traceability.
3-Bromo-1-vinyl-1H-pyrazole (C5H5BrN2) contains a nitrile group, bromine substitution. Halogen substitution raises its density and boiling point; 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).
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), 3-Bromo-1-vinyl-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 | C5H5BrN2 |
| Molecular Weight | 173.01 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 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 4-Bromo-2-methylpyrimidine (CAS 1114560-76-7)
- 2-Bromo-3-methylpyrazine (CAS 120984-76-1)
- 4-Bromo-5-methylpyrimidine (CAS 1257851-33-4)
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Recommended Standards
- 2-bromopyridin-4-amine (CAS 7598-35-8)
- 3-Bromo-6-methylpyridazine (CAS 65202-58-6)
- 2-Bromo-6-methylpyrazine (CAS 914452-71-4)
- 4-bromo-1-vinyl-1h-pyraZole (CAS 80308-80-1)
- 3-(2-Chlorophenoxymethyl)-1-benzofuran-2-carboxylic acid (CAS 1039891-11-6)
- 3,5-Bis(trifluoromethyl)ethoxybenzene (CAS 368-67-2)
- 5-methylpyridazine-3-thiol (CAS 1698728-27-6)
- 1-(Benzyloxy)-2-(4-chlorophenyl)-1H-benzo[d]imidazole (CAS 338791-25-6)
- 2-n-(Naphthalen-1-yl)pyridine-2,3-diamine (CAS 78750-71-7)
- N-((1-Benzyl-5-oxopyrrolidin-3-yl)methyl)-2-methylbenzamide (CAS 954687-24-2)
- 2-(1H-1,2,4-Triazol-3-yl)-1H-isoindole-1,3(2H)-dione (CAS 59208-47-8)
- Ethyl 6-methylbenzo[b]thiophene-2-carboxylate (CAS 1922897-63-9)
- (6-Azaspiro[3.4]Octan-8-yl)methanol (CAS 2411249-67-5)
- Semaglutide impurity 200 (CAS CATO-C4X-2226200)
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