4-Oxo-4H-quinolizine-2-carboxylic acid CAS 3243-73-0
| CAS No. | 3243-73-0 |
| Molecular Formula | C10H7NO3 |
| Molecular Weight | 189.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 4-Oxo-4H-quinolizine-2-carboxylic acid (CAS 3243-73-0), a certified reference material (molecular formula C10H7NO3, MW 189.17 g/mol) for analytical method development and quality control.
Based on its molecular formula C10H7NO3, 4-Oxo-4H-quinolizine-2-carboxylic acid contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 189.17 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C10H7NO3 |
| Molecular Weight | 189.17 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Recommended Standards
- 4-Oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxamide (CAS 33359-76-1)
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- 4-Oxo-4H-chromene-3-carboxamide (CAS 52817-14-8)
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- 7-Hydroxy-6-methoxy-2-methylquinazolin-4(3H)-one (CAS 1308676-50-7)
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- Lifitegrast Impurity 137 (CAS CATO-C4X-2409137)
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