1-(2-Bromo-5-chlorophenyl)-5-methyl-1H-pyrazole CAS 1125828-28-5
| CAS No. | 1125828-28-5 |
| Molecular Formula | C10H8BrClN2 |
| Molecular Weight | 271.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 1-(2-Bromo-5-chlorophenyl)-5-methyl-1H-pyrazole (CAS 1125828-28-5), a certified reference material (molecular formula C10H8BrClN2, MW 271.54 g/mol) for analytical method development and quality control.
Based on its molecular formula C10H8BrClN2, 1-(2-Bromo-5-chlorophenyl)-5-methyl-1H-pyrazole contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine/bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 271.54 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 1-(2-Bromo-5-chlorophenyl)-5-methyl-1H-pyrazole 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 | C10H8BrClN2 |
| Molecular Weight | 271.54 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 4-Bromo-1-[(4-chlorophenyl)methyl]-1h-pyrazole (CAS 1006538-60-8)
- 3-Bromo-7-chloro-2,4-dimethyl-1,8-naphthyridine (CAS 1021117-08-7)
- 1-(2-Bromo-5-chlorophenyl)-3-methyl-1H-pyrazole (CAS 1125828-26-3)
- 4-Bromo-1-(4-(chloromethyl)phenyl)-1H-pyrazole (CAS 1178169-30-6)
- 3-Bromo-8-chloro-2-methylquinolin-4-amine (CAS 1333256-71-5)
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- 6-Bromo-2-chloro-1-cyclopropyl-1H-benzo[d]imidazole (CAS 1416714-37-8)
- 5-Bromo-1-(2-chlorobenzyl)-1H-pyrazole (CAS 1427011-39-9)
Recommended Standards
- 3-(3-bromophenyl)-4-chloro-5-methyl-1H-pyrazole (CAS 1257858-65-3)
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- 2,4,7-Trichlorodibenzofuran (CAS 83704-42-1)
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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