7-Methoxy-4-oxo-1,4-dihydroquinoline-2-carboxylic acid CAS 77474-33-0
| CAS No. | 77474-33-0 |
| Molecular Formula | C11H9NO4 |
| Molecular Weight | 219.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 7-Methoxy-4-oxo-1,4-dihydroquinoline-2-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.
7-Methoxy-4-oxo-1,4-dihydroquinoline-2-carboxylic acid (CAS 77474-33-0), molecular formula C11H9NO4 and molecular weight 219.19 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H9NO4, 7-Methoxy-4-oxo-1,4-dihydroquinoline-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 219.19 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).
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 | C11H9NO4 |
| Molecular Weight | 219.19 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, 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.) | 1979 |
| Nitrogen Atoms | 1 |
Related Methoxy Standards
- 2-(4-Methoxy-3-indolyl)-2-oxoacetic Acid (CAS 1154742-60-5)
- 2-Methoxy-6-oxazol-2-yl-benzoic acid (CAS 1230453-58-3)
- 6-Methoxy-2-oxo-1,2-dihydroquinoline-3-carboxylicacid (CAS 154386-35-3)
- 8-Methoxy-2-oxo-2H-chromene-3-carboxamide (CAS 1728-88-7)
- 3-(2-Methoxy-phenyl)-isoxazole-5-carboxylic acid (CAS 885273-84-7)
- 6-Methoxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acid (CAS 848824-88-4)
- 6-Methoxy-4-oxo-1,4-dihydroquinoline-2-carboxylic acid (CAS 52980-06-0)
- 6-methoxy-4-oxo-1,4-dihydroquinoline-7-carboxylic acid (CAS 947763-44-2)
Recommended Standards
- 7-Methoxy-2-oxo-1,2-dihydroquinoline-4-carboxylic acid (CAS 52280-85-0)
- 8-Hydroxy-4-methoxyquinoline-2-carboxylic acid (CAS 28027-14-7)
- 7-Methoxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acid (CAS 462066-82-6)
- 8-Methoxy-1,3-dioxolo[4,5-g]quinolin-6(5H)-one (CAS 82613-16-9)
- 3-(5-Azetidin-3-yl-1,2,4-oxadiazol-3-yl)pyridine dihydrochloride (CAS 1426290-29-0)
- ((1S,5R)-3-oxabicyclo[3.1.0]Hexan-1-yl)methanol (CAS 2306255-58-1)
- 6-Bromo-5-(trifluoromethyl)nicotinic acid (CAS 1805579-11-6)
- 5-Desallyl 5-(2-Hydroxypropyl) Secobarbital (CAS 33841-18-8)
- Methyl 4,5-dibromothiophene-3-carboxylate (CAS 24647-83-4)
- 2-Fluoro-5-(hydroxymethyl)pyridine (CAS 39891-05-9)
- 1,1'-Dipropyl-[4,4'-bipyridine]-1,1'-diium bromide (CAS 52243-87-5)
- 2-Bromo-4,5-dimethylphenylboronic acid (CAS 2138894-45-6)
- 3-Chloro-4,5-dimethoxybenzoic acid (CAS 20624-87-7)
- Semaglutide impurity 88 (CAS CATO-C4X-222688)
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