2-Bromo-3-nitropyridin-4-ol CAS 31872-56-7
| CAS No. | 31872-56-7 |
| Molecular Formula | C5H3BrN2O3 |
| Molecular Weight | 218.99 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 2-Bromo-3-nitropyridin-4-ol 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.
2-Bromo-3-nitropyridin-4-ol (CAS 31872-56-7), molecular formula C5H3BrN2O3 and molecular weight 218.99 g/mol, is a CATO reference standard with documented purity and traceability.
2-Bromo-3-nitropyridin-4-ol (C5H3BrN2O3) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; 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.
Physical & Chemical Properties
| Molecular Formula | C5H3BrN2O3 |
| Molecular Weight | 218.99 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 methanol, ethanol, DMSO, water |
| 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 |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 2-Bromo-4-nitropyridin-3-ol (CAS 1013642-97-1)
- 3-Bromo-2-oxo-2H-pyran-5-carboxylic acid (CAS 108723-62-2)
- 6-Bromo-3-hydroxypyrazine-2-carboxylic acid (CAS 1260667-67-1)
- 5-Bromo-6-hydroxypyrimidine-4-carboxylic acid (CAS 135274-82-7)
- 3-Bromo-2-hydroxy-5-nitropyridine (CAS 15862-33-6)
- 2-Bromo-6-nitropyridin-3-ol (CAS 167683-72-9)
- 3-Bromo-4-nitropyridine 1-Oxide (CAS 1678-49-5)
- 5-Bromo-6-oxo-1,6-dihydropyridazine-3-carboxylic acid (CAS 1781856-45-8)
Recommended Standards
- 2-Bromo-3-nitropyridin-4(1H)-one (CAS 99035-23-1)
- 2-Bromo-4-nitropyridine N-Oxide (CAS 52092-43-0)
- 5-Bromo-2-formylfuran-3-carboxylic acid (CAS 1824373-39-8)
- 2-Bromo-5-nitropyridin-4-ol (CAS 54079-67-3)
- tert-Butyl n-[2-(4-fluoro-3-methylphenyl)-2-oxoethyl]carbamate (CAS 1035818-88-2)
- 5,10-Dimethyl-5,10-dihydrophenazine (CAS 15546-75-5)
- (2-(2-Bromophenyl)thiazol-4-yl)methanamine (CAS 885280-21-7)
- 4,4,5,5-Tetramethyl-2-(2-methylbenzo[b]thiophen-3-yl)-1,3,2-dioxaborolane (CAS 1174298-60-2)
- n-Ethyl-3,4-dimethylcyclohexan-1-amine (CAS 1341883-55-3)
- Ceratamine B (CAS 634151-16-9)
- 2,5-Dibromonicotinamide (CAS 1394291-40-7)
- 2,5-Dimethyl-1-(2-methylpropyl)-1H-pyrrole (CAS 21407-84-1)
- (+)-alfa-Longipinene (CAS 5989-08-2)
- Peptide T (CAS 106362-32-7)
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