1-Ethyl-6-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid CAS 32932-15-3
| CAS No. | 32932-15-3 |
| Molecular Formula | C13H13NO4 |
| Molecular Weight | 247.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-Ethyl-6-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (C13H13NO4) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
1-Ethyl-6-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (CAS 32932-15-3), molecular formula C13H13NO4 and molecular weight 247.25 g/mol, is a CATO reference standard with documented purity and traceability.
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.
As a certified reference material (CRM), 1-Ethyl-6-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C13H13NO4 |
| Molecular Weight | 247.25 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 1966 |
| Nitrogen Atoms | 1 |
Related Ethyl Standards
- 4-(5-Methoxy-1H-indol-3-yl)-4-oxobutanoic acid (CAS 100394-00-1)
- 2-(6-Methoxy-2-methyl-4-oxoquinolin-1(4H)-yl)acetic acid (CAS 1083197-14-1)
- Methyl 2-(8-methoxy-4-oxoquinolin-1(4H)-yl)acetate (CAS 1170391-76-0)
- Methyl 2-(6-methoxy-4-oxoquinolin-1(4H)-yl)acetate (CAS 1171191-90-4)
- 2-Methoxy-N-(4-methyl-3-(1h-tetrazol-1-yl)phenyl)acetamide (CAS 1209594-95-5)
- 2-((8-Methoxy-2-methylquinolin-4-yl)oxy)acetic acid (CAS 123452-96-0)
- Methyl 6-methoxy-5-(4-methyl-1H-imidazol-1-yl)picolinate (CAS 1262197-81-8)
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Recommended Standards
- 1-Ethyl-5-methyl-2-(4-nitrophenyl)-1H-pyrazol-3(2H)-one (CAS 88585-26-6)
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- 1-Ethyl-4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carbohydrazide (CAS 74693-62-2)
- 1-Ethyl-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (CAS 32932-14-2)
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