5-Chloro-6-oxo-1,6-dihydropyridine-2-carboxylic Acid CAS 103997-21-3
| CAS No. | 103997-21-3 |
| Molecular Formula | C6H4ClNO3 |
| Molecular Weight | 173.55 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Chloro-6-oxo-1,6-dihydropyridine-2-carboxylic Acid is closely related to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Chloro-6-oxo-1,6-dihydropyridine-2-carboxylic Acid (CAS 103997-21-3), molecular formula C6H4ClNO3 and molecular weight 173.55 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5-Chloro-6-oxo-1,6-dihydropyridine-2-carboxylic Acid (C6H4ClNO3) is characterized by an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 | C6H4ClNO3 |
| Molecular Weight | 173.55 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloro Standards
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Recommended Standards
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- 2,2-Dichlorocyclopropanecarbonyl chloride (CAS 5365-15-1)
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- n-(1h-1,3-Benzodiazol-2-yl)acetamide (CAS 21202-05-1)
- 3-(4-Ethoxyphenyl)propan-1-ol (CAS 72457-43-3)
- 4'-Hydroxy-5-methoxy-[1,1'-biphenyl]-2-carboxylic acid (CAS 1181608-93-4)
- Benzyl 2-(((2-aminoethyl)(isopropyl)amino)methyl)piperidine-1-carboxylate (CAS 1353957-66-0)
- 2-Chloro-N-((S)-1-phenylethyl)propanamide (CAS 596807-99-7)
- 5-Chloro-1,3-dihydro-2H-benzo[d]imidazole-2-thione (CAS 25369-78-2)
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