2-Hydroxy-4-nitropyridine 4-Nitro-2-pyridinol 4-Nitropyrid-2-one 4487-51-8 CAS 4487-51-8
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 4487-51-8 |
| Molecular Formula | C5H4N2O3 |
| Molecular Weight | 140.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Hydroxy-4-nitropyridine 4-Nitro-2-pyridinol 4-Nitropyrid-2-one 4487-51-8 (CAS 4487-51-8) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C5H4N2O3. Molecular weight: 140.10 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C5H4N2O3 |
| Molecular Weight | 140.10 g/mol |
| 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 |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
Related Hydroxy Standards
- 4-Hydroxy-2-nitropyridine (CAS 101654-28-8)
- 3-Hydroxy-4-nitropyridine (CAS 13505-06-1)
- 5-Hydroxy-2-nitropyridine (CAS 15206-26-5)
- 3-Hydroxy-5-nitropyridine (CAS 186593-26-0)
- 2-Hydroxy-3-nitropyridine (CAS 6332-56-5)
- 6-Hydroxy-4-pyrimidinecarboxylic Acid (CAS 6299-87-2)
- 4-Hydroxy-2-oxo-2H-pyran-6-carbaldehyde (CAS 147647-75-4)
- N’-hydroxy-2-(1H-pyrazol-1-yl)ethanimidamide (CAS 1158119-05-1)
Recommended Standards
- Trans-3-(trifluoromethyl)cyclobutanol (CAS 2091782-60-2)
- Vonoprazan Impurity 133 (CAS 15128-82-2)
- Piracetam EP Impurity 3 (CAS 36327-91-0)
- 1-(((3-Methylbutan-2-yl)amino)methyl)cyclohexan-1-ol (CAS 1183954-18-8)
- Methyl 2-({2-[2-(trifluoromethyl)-1H-1,3-benzimidazol-1-yl]propanoyl}amino)benzenecarboxylate (CAS 692732-71-1)
- 2-methyl-2-(4-methylpyridin-2-yl)propanoic acid hydrochloride (CAS 2044714-31-8)
- Doxazosin Impurity 10 (CAS 3663-79-4)
- 4-Hydroxy-N-(7-methyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenecarboxamide (CAS 866152-19-4)
- 2-(3-Hydroxynaphthalen-2-yl)quinazolin-4(1H)-one (CAS 28683-93-4)
- Semaglutide impurity 28 (CAS CATO-C4X-222628)
Why CATO?
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