5-Nitrobenzofuran-2(3H)-one CAS 21997-23-9
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 21997-23-9 |
| Molecular Formula | C8H5NO4 |
| Molecular Weight | 179.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Nitrobenzofuran-2(3H)-one (CAS 21997-23-9) is a pharmaceutical standards certified reference material from CATO. Molecular formula: C8H5NO4. Molecular weight: 179.13 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C8H5NO4 |
| Molecular Weight | 179.13 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 |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 1 |
Related Nitrobenzofuran Standards
- 6-Nitrobenzofuran-3(2H)-one (CAS 1199783-01-1)
- 4-Nitrobenzofuran-3(2H)-one (CAS 1199783-06-6)
- 3-Nitrobenzofuran-5-ol (CAS 126318-27-2)
- 7-Nitrobenzofuran-5-ol (CAS 1384895-50-4)
- 2-Nitrobenzofuran-4-ol (CAS 40024-31-5)
- 2-Nitrobenzofuran-6-ol (CAS 40739-72-8)
- 2-Nitrobenzofuran-7-ol (CAS 40739-73-9)
- 5-Nitrobenzofuran-3(2H)-one (CAS 25158-68-3)
Recommended Standards
- 5-Nitrobenzo[c]isoxazol-3-amine (CAS 94144-40-8)
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- 5-Nitroisophthalaldehyde (CAS 36308-36-8)
- Morphine-3-β-D-glucuronide (CAS 20290-09-9)
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- Atenolol EP Impurity A (CAS 17194-82-0)
- tert-Butyl ((5-(hydroxymethyl)thiazol-2-yl)methyl)carbamate (CAS 183066-67-3)
- 1-Isopropyl-3-((3-methylisoxazol-5-yl)methyl)urea (CAS 1340872-59-4)
- Staphylococcus Aureus Protein A (SpA)-Derived Peptide (H-2228.0005) (CAS 144979-26-0)
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