3,4-Dibromo-1-methyl-pyrazole CAS 89607-14-7
| CAS No. | 89607-14-7 |
| Molecular Formula | C4H4Br2N2 |
| Molecular Weight | 239.90 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3,4-Dibromo-1-methyl-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.
3,4-Dibromo-1-methyl-pyrazole (CAS 89607-14-7) is a high-purity analytical reference standard with the molecular formula C4H4Br2N2 and a molecular weight of 239.90 g/mol.
The molecular framework of 3,4-Dibromo-1-methyl-pyrazole (C4H4Br2N2) is characterized by a nitrile group, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C4H4Br2N2 |
| Molecular Weight | 239.90 g/mol |
| Appearance | 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Dibromo Standards
- 4,5-Dibromo-1-methylimidazole (CAS 1003-50-5)
- 3,5-Dibromo-1-methyl-1H-pyrazole (CAS 1361019-05-7)
- 2,4-Dibromo-1-methyl-1H-imidazole, 97% (CAS 53857-60-6)
- 2,5-Dibromo-1-methyl-1H-imidazole, 97% (CAS 53857-59-3)
- 2,5-Dibromo-4-methylimidazole (CAS 219814-29-6)
- 3,4-Dibromo-5-methylpyrazole (CAS 5932-19-4)
- 3,5-Dibromo-4-methyl-1H-pyrazole (CAS 60061-54-3)
- 4,5-Dibromo-1-methyl-1H-pyrazole (CAS 70951-86-9)
Recommended Standards
- 4,5-Dibromo-2-methyl-1H-imidazole (CAS 4002-81-7)
- 3,5-Dibromopyridine-d3 (CAS 1219799-05-9)
- 2-Bromo-5-(bromomethyl)furan (CAS 251649-67-9)
- 2,2,2-Trichloro-1,1-Dimethylethyl Chloroformate 66270-36-8 TCBoc-chloride |A,|A,|A-Trichloro-tert-butoxycarbonyl chloride |A,|A,|A-Trichloro-tert-butyl chloroformate (CAS 66270-36-8)
- (3S)-oxan-3-ylmethanol (CAS 1123786-69-5)
- 7-[(Anilinocarbonyl)amino]-5-methyl-3-phenyl-1H-indole-2-carboxylic acid (CAS 1171142-83-8)
- 4-Chloro-2-methylbenzotrifluoride (CAS 13630-22-3)
- benzyl(octan-2-yl)amine (CAS 149243-90-3)
- 1-[(4-Bromophenyl)methyl]-2-(2-ethoxy-2-oxoethyl)pyridin-1-ium bromide (CAS 477710-22-8)
- 1,2-dihenarachidoyl-sn-glycero-3-phosphocholine 253685-28-8 (CAS 253685-28-8)
- 4-Bromo-N-(4-ethynylphenyl)benzenesulfonamide (CAS 860788-61-0)
- Ethyl 2-(5-bromo-2-(4-(trifluoromethoxy)phenyl)thiazol-4-yl)acetate (CAS 1416437-97-2)
- 1-(2-Bromophenyl)-2,2-dimethylpropan-1-one (CAS 61593-14-4)
- Des-Ala18-Tirzepatide (CAS CATO-CPTD788955)
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