2-Bromo-3-methyl-4-nitropyridine CAS 79055-55-3
| CAS No. | 79055-55-3 |
| Molecular Formula | C6H5BrN2O2 |
| Molecular Weight | 217.02 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 2-Bromo-3-methyl-4-nitropyridine (C6H5BrN2O2) is characterized by an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. 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. 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).
2-Bromo-3-methyl-4-nitropyridine (CAS 79055-55-3) is a high-purity analytical reference standard with the molecular formula C6H5BrN2O2 and a molecular weight of 217.02 g/mol.
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.
As a certified reference material (CRM), 2-Bromo-3-methyl-4-nitropyridine 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 | C6H5BrN2O2 |
| Molecular Weight | 217.02 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 2-Bromo-3-hydroxybenzoic acid (CAS 91658-91-2)
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- 2-Bromo-3-nitro-6-methylpyridine (CAS 374633-31-5)
- N-(3,5-Dimethoxyphenyl)-2-((3-ethyl-5,6-dimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidin-2-yl)thio)acetamide (CAS 575460-08-1)
- ethyl 2-(2,2-difluoroethyl)-6-oxo-6,7-dihydro-2H-pyrazolo[3,4-b]pyridine-4-carboxylate (CAS 1160246-07-0)
- 2-(5,7-Bis(trifluoromethyl)-1,8-naphthyridin-2-yl)-2-phenylacetonitrile (CAS 338791-75-6)
- 1-(4-Nitrophenyl)-1H-pyrazole-4-carbonitrile (CAS 102539-56-0)
- 1-(5-(Pyridin-3-yl)thiophen-2-yl)ethan-1-one (CAS 187540-78-9)
- 1-(Hydroxymethyl)-1,2,3,4-tetrahydronaphthalene-1-carbonitrile (CAS 157736-48-6)
- 3-(methylsulfanyl)-4-(pyrrolidin-1-yl)pyrrolidine dihydrochloride (CAS 1461714-84-0)
- 5-Bromo-N-(cyclopropylmethyl)pyridine-3-sulfonamide (CAS 1251249-03-2)
- Ethyl 1-methyl-4-nitro-1H-pyrrole-2-carboxylate (CAS 2853-29-4)
- Insulin Degludec Impurity 19 (CAS CATO-C4X-215719)
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