4-oxo-1,4-dihydrocinnoline-3-carboxylic acid CAS 18514-85-7
| CAS No. | 18514-85-7 |
| Molecular Formula | C9H14N2O3 |
| Molecular Weight | 198.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-oxo-1,4-dihydrocinnoline-3-carboxylic acid (CAS 18514-85-7), molecular formula C9H14N2O3 and molecular weight 198.22 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H14N2O3, 4-oxo-1,4-dihydrocinnoline-3-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 198.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C9H14N2O3 |
| Molecular Weight | 198.22 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
Related oxo Standards
Recommended Standards
- tert-Butyl 3-(hydroxymethyl)-1H-pyrazole-1-carboxylate (CAS 1823967-74-3)
- 6H-Benzo[c]chromen-1-ol (CAS 185613-45-0)
- 3-Isobutoxy-1-methyl-1H-pyrazole-5-carboxylic acid (CAS 1823441-94-6)
- 3-(4-Isopropoxy-pyrazol-1-yl)-propionic acid (CAS 1863360-13-7)
- 2-Phenethyl-1-(trifluoromethyl)-5,6-dihydro-4H-pyrrolo[3,2,1-ij]quinoline (CAS 866049-84-5)
- tert-Butyl cis-4-hydroxy-1-(trifluoromethyl)cyclohexane-1-carboxylate (CAS 2787518-72-1)
- (2-Amino-6-methyl-4,5,6,7-tetrahydrobenzo[b]thiophen-3-yl)(morpholino)methanone (CAS 590376-48-0)
- Ethyl Imidazole-2-carboxylate (CAS 33543-78-1)
- Momelotinib impurity 18 (CAS CATO-C4X-337718)
- tert-Butyl 1,1-dimethyl-1,2-dihydrobenzo[d][1,3]azasiline-3(4H)-carboxylate (CAS 2222440-51-7)
- 5-Chloro-3-(2-methoxy-5-nitrobenzyl)benzo[d]oxazol-2(3H)-one (CAS 898796-77-5)
- (3-Ethoxytetrahydro-2h-pyran-3-yl)methanamine (CAS 1492882-63-9)
- 7-bromo-5-methoxy-1,3-benzoxazole (CAS 937601-57-5)
- Semaglutide Impurity 177 (CAS CATO-C4X-2226177)
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