5-Methoxy-2-nitrophenol CAS 704-14-3
| CAS No. | 704-14-3 |
| Molecular Formula | C7H7NO4 |
| Molecular Weight | 169.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Methoxy-2-nitrophenol (CAS 704-14-3) is a high-purity analytical reference standard with the molecular formula C7H7NO4 and a molecular weight of 169.13 g/mol.
Based on its molecular formula C7H7NO4, 5-Methoxy-2-nitrophenol contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 169.13 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).
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), 5-Methoxy-2-nitrophenol 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 | C7H7NO4 |
| Molecular Weight | 169.13 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Methoxy Standards
- 5-Methoxy-4-oxo-1,4-dihydropyridine-2-carboxylic acid (CAS 103878-37-1)
- 5-Methoxy-6-oxo-1,6-dihydropyridine-2-carboxylic acid (CAS 112750-29-5)
- 4-Methoxy-6-oxo-1,6-dihydropyridine-2-carboxylic acid (CAS 1393532-27-8)
- 4-Methoxy-3-nitrophenol (CAS 15174-02-4)
- 4-Methoxy-2-nitrophenol (CAS 1568-70-3)
- 2-Methoxy-6-nitrophenol (CAS 15969-08-1)
- 3-Methoxy-4-nitrophenol (CAS 16292-95-8)
- 5-Methoxy-2-oxo-1,2-dihydropyridine-3-carboxylic acid (CAS 1864052-01-6)
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