4,5-Dibromo-2-ethyl-1H-imidazole CAS 4002-82-8
| CAS No. | 4002-82-8 |
| Molecular Formula | C5H6Br2N2 |
| Molecular Weight | 253.92 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4,5-Dibromo-2-ethyl-1H-imidazole is closely related to a nitrile group, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4,5-Dibromo-2-ethyl-1H-imidazole (CAS 4002-82-8), molecular formula C5H6Br2N2 and molecular weight 253.92 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4,5-Dibromo-2-ethyl-1H-imidazole (C5H6Br2N2) contains a nitrile group, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 253.92 g/mol, it falls into the medium-molecular-weight range. 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 | C5H6Br2N2 |
| Molecular Weight | 253.92 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
- 3,5-Dibromo-1,4-dimethyl-1H-pyrazole (CAS 134589-54-1)
- 3,5-Dibromo-1-ethyl-1H-pyrazole (CAS 1596745-76-4)
- 4,5-Dibromo-1,2-dimethyl-1H-imidazole (CAS 16954-05-5)
- 2,4-Dibromo-1,5-dimethyl-1H-imidazole (CAS 850429-57-1)
- 2,5-Dibromo-1,4-dimethyl-1H-imidazole (CAS 850429-58-2)
- 3,4-Dibromo-1,5-dimethyl-1h-pyrazole (CAS 5775-95-1)
- 4,5-Dibromo-1,3-dimethyl-1H-pyrazole (CAS 5744-71-8)
- 1,3-Dibromo-5-fluorobenzene (CAS 1435-51-4)
Recommended Standards
- 4-Bromo-1-(2-bromoethyl)-1H-pyrazole (CAS 214614-82-1)
- Tetrachlorothiophene Dioxide (CAS 72448-17-0)
- Tris(2,2-difluoroethyl) borate (CAS 1396338-09-2)
- 2-Fluoro-3-methoxy-5-(trifluoromethoxy)phenylboronic acid (CAS 2096330-80-0)
- 3-((1-Methyl-1H-benzo[d]imidazol-2-yl)thio)propanoic acid (CAS 342013-63-2)
- Methyl 2-amino-2-(2,3-dihydro-1H-inden-2-yl)acetate hydrochloride (CAS 155172-72-8)
- 3-(Nitromethyl)cyclohexanone (CAS 50870-56-9)
- (((1-Ethynylcyclopropyl)methoxy)methyl)benzene (CAS 2068725-75-5)
- N-((5-bromopyridin-3-yl)methyl)ethanamine (CAS 1152850-79-7)
- 1-(3-Chloro-2-methylphenyl)-2,2,3,3,3-pentafluoropropan-1-one (CAS 1352210-01-5)
- 4-Bromo-1-(2-methoxyphenyl)pyridin-2(1h)-one (CAS 1822826-89-0)
- 1-(1-Naphthyl)-2-propanone (CAS 33744-50-2)
- (4,6-Dibromo-2-fluoro-3-methoxyphenyl)methanol (CAS 2432848-98-9)
- Semaglutide impurity 22(OtBu-Ste-γGlu(OtBu)-AEEA-AEEA-OH) (CAS 1118767-16-0)
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