4,5-Difluoro-2-nitrophenol CAS 55346-97-9
| CAS No. | 55346-97-9 |
| Molecular Formula | C6H3F2NO3 |
| Molecular Weight | 175.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4,5-Difluoro-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.
4,5-Difluoro-2-nitrophenol (CAS 55346-97-9), molecular formula C6H3F2NO3 and molecular weight 175.09 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4,5-Difluoro-2-nitrophenol (C6H3F2NO3) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 175.09 g/mol, it falls into the medium-molecular-weight range. 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 | C6H3F2NO3 |
| Molecular Weight | 175.09 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | >95% |
| 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Difluoro Standards
- 2,3-Difluoro-5-nitrophenol (CAS 1119455-04-7)
- 2,4-Difluoro-5-nitrophenol (CAS 113512-57-5)
- 2,5-Difluoro-4-nitrophenol (CAS 120103-18-6)
- 2,3-Difluoro-4-nitrophenol (CAS 123173-60-4)
- 2,6-Difluoro-3-nitrophenol (CAS 1393179-72-0)
- 3,5-Difluoro-4-nitrophenol (CAS 147808-41-1)
- 3,5-Difluoro-2-nitrophenol (CAS 151414-46-9)
- 2,4-Difluoro-3-nitrophenol (CAS 1803809-58-6)
Recommended Standards
- 4,6-Difluoro-3-nitropyridin-2-amine (CAS 60186-22-3)
- 1-Methylxanthine-2,4,5,6-<SUP>13</SUP>C<SUB>4</SUB>, 1,3,9-<SUP>15</SUP>N<SUB >3</SUB> (CAS 1173018-69-3)
- 2,6-Difluoro-4-nitrophenol (CAS 658-07-1)
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