4-bromo-3,5-bis(2-methylphenyl)-1h-pyraZole CAS 1238259-91-0
| CAS No. | 1238259-91-0 |
| Molecular Formula | C17H15BrN2 |
| Molecular Weight | 327.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 4-bromo-3,5-bis(2-methylphenyl)-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.
CATO supplies 4-bromo-3,5-bis(2-methylphenyl)-1h-pyraZole (CAS 1238259-91-0), a certified reference material (molecular formula C17H15BrN2, MW 327.22 g/mol) for analytical method development and quality control.
Based on its molecular formula C17H15BrN2, 4-bromo-3,5-bis(2-methylphenyl)-1h-pyraZole contains a nitrogen-containing heterocyclic scaffold, a nitrile group, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 327.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
Physical & Chemical Properties
| Molecular Formula | C17H15BrN2 |
| Molecular Weight | 327.22 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
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- tert-Butyl 2-(2-bromopyridin-3-yl)pyrrolidine-1-carboxylate (CAS 1352508-48-5)
- 3,3-Difluoro-2-oxoindoline-5-sulfonyl chloride (CAS 1706454-18-3)
- (3-Pyridin-3-ylphenyl)methanol (CAS 85553-54-4)
- 2-(2,6-dioxo-3-piperidyl)-5-(pentylamino)isoindoline-1,3-dione (CAS 1809556-66-8)
- 9-Hydroxy-4H-pyrido[1,2-a]pyrimidin-4-one (CAS 123458-49-1)
- (2S,3R)-2-(Hydroxymethyl)pyrrolidin-3-ol (CAS 198705-78-1)
- Methyl 2-amino-3,5-dibromo-4-fluorobenzoate (CAS 1403483-78-2)
- (E)-4-(4-Isopropylphenyl)-4-oxobut-2-enoic acid (CAS 29587-82-4)
- Potassium trifluoro(prop-1-yn-1-yl)borate (CAS 1500106-31-9)
- Tetraethylammoniumbenzoate (CAS 16909-22-1)
- Tripeptide-10 citrulline (CAS 960531-53-7)
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