3-Chloro-2-nitropyridin-4-ol CAS 1807249-93-9
| CAS No. | 1807249-93-9 |
| Molecular Formula | C5H3ClN2O3 |
| Molecular Weight | 174.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Chloro-2-nitropyridin-4-ol (CAS 1807249-93-9) is a high-purity analytical reference standard with the molecular formula C5H3ClN2O3 and a molecular weight of 174.54 g/mol.
Based on its molecular formula C5H3ClN2O3, 3-Chloro-2-nitropyridin-4-ol contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 174.54 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C5H3ClN2O3 |
| Molecular Weight | 174.54 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) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 2-Chloro-5-nitropyridin-4-ol (CAS 1211386-69-4)
- 4-Chloro-3-nitropyridin-2(3H)-one (CAS 1218764-78-3)
- 2-Chloro-5,6-difluoronicotinonitrile (CAS 1309371-71-8)
- 2-Chloro-5-nitropyridin-3-ol (CAS 1395037-06-5)
- 2-Chloro-4-nitropyridine 1-Oxide (CAS 14432-16-7)
- 5-Chloro-3-oxo-3,4-dihydropyrazine-2-carboxylic acid (CAS 150718-29-9)
- 2-Chloro-4-nitro-3-pyridinol (CAS 15128-85-5)
- 2-chloro-3-hydroxy-6-nitro-pyridin (CAS 15206-27-6)
Recommended Standards
- 6-Chloro-5-nitropyridin-3-ol (CAS 1807187-01-4)
- 5-Chloro-2-nitropyridin-4-ol (CAS 1807250-01-6)
- 5-Chloro-6-nitropyridin-3-ol (CAS 1805223-40-8)
- (Z)-2-(4-chloro-5-oxofuran-2(5H)-ylidene)acetic acid (CAS 22752-93-8)
- Zopostat (CAS 110703-94-1)
- 4-(Chloromethyl)-1,3,5-trimethyl-1H-pyrazole (CAS 1152497-50-1)
- Ethyl 2-(4-Methyl-2-thiazolyl)acetate (CAS 51221-43-3)
- Cloransulam-Methyl Impurity 1 (CAS CATO-C4X-31701)
- 1-Bromo-4-methoxy-2-(phenoxymethyl)benzene (CAS 866097-01-0)
- ethyl cis-3-hydroxy-1-methyl-cyclobutanecarboxylate (CAS 1408074-72-5)
- (4R,5R)-1,3-di-tert-butyl-4,5-dimethyl-1,3,2lambda2-diazastannolidine (CAS 1268357-44-3)
- 3-(1-Chloroethyl)pyridine hydrochloride (CAS 97516-11-5)
- 4-(2-Bromophenoxy)piperidine hydrochloride (CAS 916889-48-0)
- Heptapeptide-6 (CAS CATO-CPTD788823)
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