4,5-Dibromo-2-methyl-2H-1,2,3-triazole CAS 28938-17-2
| CAS No. | 28938-17-2 |
| Molecular Formula | C3H3Br2N3 |
| Molecular Weight | 240.88 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4,5-Dibromo-2-methyl-2H-1,2,3-triazole (CAS 28938-17-2) is a high-purity analytical reference standard with the molecular formula C3H3Br2N3 and a molecular weight of 240.88 g/mol.
Structurally, 4,5-Dibromo-2-methyl-2H-1,2,3-triazole (C3H3Br2N3) 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 240.88 g/mol, it falls into the medium-molecular-weight range. 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).
As a certified reference material (CRM), 4,5-Dibromo-2-methyl-2H-1,2,3-triazole 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.
Physical & Chemical Properties
| Molecular Formula | C3H3Br2N3 |
| Molecular Weight | 240.88 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.) | 1965 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Related Dibromo Standards
- 2,4-Dibromo-1H-imidazol-5-amine (CAS 1029720-13-5)
- 3,5-Dibromo-1-methyl-1,2,4-triazole (CAS 23579-79-5)
- 4,5-Dibromo-1-methyl-1,2,3-triazole (CAS 25537-64-8)
- 1,2-Dibromo-1-chloro-1-fluoroethane (CAS 243139-69-7)
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- 4,5-Dibromo-1-methylimidazole (CAS 1003-50-5)
Recommended Standards
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- (2-Bromo-5-cyclopropylphenyl)boronic acid (CAS 2225173-90-8)
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- Semaglutide impurity 36 (CAS CATO-C4X-222636)
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