4,5-Dibromo-2-methyl-1H-imidazole CAS 4002-81-7
| CAS No. | 4002-81-7 |
| Molecular Formula | C4H4Br2N2 |
| Molecular Weight | 239.90 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4,5-Dibromo-2-methyl-1H-imidazole (CAS 4002-81-7), a certified reference material (molecular formula C4H4Br2N2, MW 239.90 g/mol) for analytical method development and quality control.
4,5-Dibromo-2-methyl-1H-imidazole (C4H4Br2N2) 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. 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
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.) | 1958 |
| 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-1-methyl-pyrazole (CAS 89607-14-7)
- 3,4-Dibromo-5-methylpyrazole (CAS 5932-19-4)
- 3,5-Dibromo-4-methyl-1H-pyrazole (CAS 60061-54-3)
Recommended Standards
- 4,5-Dibromo-1-methyl-1H-pyrazole (CAS 70951-86-9)
- 3,5-Dibromopyridine-d3 (CAS 1219799-05-9)
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- 1-Bromo-2,5-dichloro-3-methylbenzene (CAS 1000571-63-0)
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