4-Bromo-5-methyl-1-phenyl-1H-pyrazole CAS 50877-44-6
| CAS No. | 50877-44-6 |
| Molecular Formula | C10H9BrN2 |
| Molecular Weight | 237.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-Bromo-5-methyl-1-phenyl-1H-pyrazole.
4-Bromo-5-methyl-1-phenyl-1H-pyrazole (CAS 50877-44-6), molecular formula C10H9BrN2 and molecular weight 237.10 g/mol, is a CATO reference standard with documented purity and traceability.
4-Bromo-5-methyl-1-phenyl-1H-pyrazole (C10H9BrN2) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, bromine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; 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.
As a certified reference material (CRM), 4-Bromo-5-methyl-1-phenyl-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 | C10H9BrN2 |
| Molecular Weight | 237.10 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 4-bromo-2-cyclopropyl-1H-pyrrolo[2,3-b]pyridine (CAS 1014614-11-9)
- 1-Bromo-3-cyclopropylimidazo[1,5-a]pyridine (CAS 1018603-14-9)
- 3-Bromo-2,4-dimethyl-1,8-naphthyridine (CAS 1019108-06-5)
- 8-Bromo-2-methylquinolin-5-amine (CAS 1023815-94-2)
- 4-Bromo-2-(o-tolyl)-1H-imidazole (CAS 1049117-87-4)
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- 4-Bromo-1-methyl-5-phenyl-1H-pyrazole (CAS 105994-77-2)
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Recommended Standards
- 4-Bromo-1-p-tolyl-1H-pyrazole (CAS 957034-98-9)
- 5-(3-Bromophenyl)-1-methyl-1H-pyrazole (CAS 425379-69-7)
- 4-Bromo-1-methyl-2-phenyl-1H-imidazole (CAS 86119-59-7)
- 5-(4-Bromophenyl)-1-methylpyrazole (CAS 73387-52-7)
- Methyl 1-[((4-[(6,7-dimethoxy-4-quinolinyl)oxy]phenyl)amino)carbonyl]cyclopropanecarboxylate (CAS 1584696-82-1)
- 4-(1-Methyl-1H-imidazol-2-yl)azepan-4-ol (CAS 1564565-59-8)
- N3-(2,4-Difluorophenyl)-2-chloro-4-(trifluoromethyl)nicotinamide (CAS 288246-33-3)
- 5-(Bromomethyl)-2-hydroxypyridine (CAS 366448-37-5)
- 2,4-dimethoxythieno[2,3-d]pyrimidine (CAS 18740-40-4)
- 4-Bromo-1-naphthalenesulfonic acid (CAS 162109-20-8)
- Ethyl (7R,8S)-8-amino-1,4-dioxaspiro[4.5]Decane-7-carboxylate 4-methylbenzenesulfonate (CAS 1004536-92-8)
- 2,5-Difluoro-6-methylbenzeneboronic acid, pinacol ester (CAS 1025707-98-5)
- Methyl 6-(trifluoromethyl)benzo[b]thiophene-2-carboxylate (CAS 863118-41-6)
- Exenatide Acetate (CAS 141732-76-5)
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