2,3-Dibromo-5,6-dimethylpyrazine CAS 98142-06-4
| CAS No. | 98142-06-4 |
| Molecular Formula | C6H6Br2N2 |
| Molecular Weight | 265.93 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 265.93 g/mol gives 2,3-Dibromo-5,6-dimethylpyrazine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2,3-Dibromo-5,6-dimethylpyrazine (CAS 98142-06-4), molecular formula C6H6Br2N2 and molecular weight 265.93 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C6H6Br2N2, 2,3-Dibromo-5,6-dimethylpyrazine contains a nitrile group, bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 265.93 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C6H6Br2N2 |
| Molecular Weight | 265.93 g/mol |
| Appearance | Off-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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Dibromo Standards
- 2,6-Dibromo-3-methylphenol (CAS 100477-79-0)
- 2,5-Dibromo-3,6-dimethylpyrazine, 96% (CAS 121594-49-8)
- 5,6-Dibromo-2-methylpyridin-3-amine (CAS 1227628-71-8)
- 4,6-Dibromo-2-methylpyridin-3-amine (CAS 126325-49-3)
- 2,6-Dibromo-5-methylpyridin-3-amine (CAS 126325-51-7)
- 3,5-Dibromo-2-methylpyridin-4-amine (CAS 126325-54-0)
- 4,5-Dibromo-2-cyclopropyl-1H-imidazole (CAS 1269233-20-6)
- 3,5-Dibromo-4-methylphenol (CAS 13979-81-2)
Recommended Standards
- 2,3-Bis(bromomethyl)pyrazine (CAS 282528-30-7)
- 2,3-Dibromoanisole (CAS 95970-22-2)
- 2-(Dibromomethyl)-5-methylpyrazine (CAS 79081-84-8)
- 2,4-Dibromo-6-methylphenol (CAS 609-22-3)
- 4-Cyano-2-methylbutanoic acid (CAS 37810-29-0)
- 2-(6-Chloroimidazo[1,2-a]pyridin-2-yl)benzoic acid (CAS 900015-65-8)
- 1-(2-methoxy-2-methylpropyl)piperidin-4-one (CAS 1566427-70-0)
- 1-tert-Butyl 2-Methyl 2-ethyl-4,4-difluoropyrrolidine-1,2-dicarboxylate (CAS 1823265-23-1)
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