2-Bromo-4-nitrobenzoic Acid CAS 16426-64-5
| CAS No. | 16426-64-5 |
| Molecular Formula | C7H4BrNO4 |
| Molecular Weight | 246.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 2-Bromo-4-nitrobenzoic Acid (CAS 16426-64-5), a certified reference material (molecular formula C7H4BrNO4, MW 246.01 g/mol) for analytical method development and quality control.
2-Bromo-4-nitrobenzoic Acid (C7H4BrNO4) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 2-Bromo-4-nitrobenzoic Acid 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 | C7H4BrNO4 |
| Molecular Weight | 246.01 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Related Bromo Standards
- 3-Bromo-4-nitrobenzoic Acid (CAS 101420-81-9)
- 3-Bromo-2-nitrobenzoic acid (CAS 116529-61-4)
- 5-Bromo-2-hydroxy-3-nitrobenzaldehyde (CAS 16634-88-1)
- 3-Bromo-2-hydroxy-5-nitrobenzaldehyde (CAS 16789-84-7)
- 2-Bromo-3-nitrobenzoic Acid (CAS 573-54-6)
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