2-(3,4-Dimethoxyphenyl)-4-oxo-1,4-dihydroquinoline-8-carboxylic acid CAS 90034-82-5
| CAS No. | 90034-82-5 |
| Molecular Formula | C18H15NO5 |
| Molecular Weight | 325.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 2-(3,4-Dimethoxyphenyl)-4-oxo-1,4-dihydroquinoline-8-carboxylic acid.
2-(3,4-Dimethoxyphenyl)-4-oxo-1,4-dihydroquinoline-8-carboxylic acid (CAS 90034-82-5) is a high-purity analytical reference standard with the molecular formula C18H15NO5 and a molecular weight of 325.32 g/mol.
2-(3,4-Dimethoxyphenyl)-4-oxo-1,4-dihydroquinoline-8-carboxylic acid (C18H15NO5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. 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).
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 | C18H15NO5 |
| Molecular Weight | 325.32 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 |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 1 |
Related Dimethoxyphenyl Standards
- N-(3,5-Dimethoxyphenyl)-8-nitroisoquinolin-5-amine (CAS 1090479-06-3)
- 2-(2,4-Dimethoxyphenyl)-1-oxo-1,2-dihydroisoquinoline-4-carboxylic acid (CAS 1429901-97-2)
- 2-(2,5-Dimethoxyphenyl)-1-oxo-1,2-dihydroisoquinoline-4-carboxylic acid (CAS 1429903-79-6)
- 2-(2,4-Dimethoxyphenyl)-4-oxo-1,4-dihydroquinoline-6-carboxylic acid (CAS 90034-48-3)
- 2-(3,4-Dimethoxyphenyl)-4-oxo-1,4-dihydroquinoline-6-carboxylic acid (CAS 90034-50-7)
- N-(2,5-Dimethoxyphenyl)-4-(1H-tetrazol-1-yl)benzamide (CAS 851722-68-4)
- n-(3,4-Dimethoxyphenyl)-2-(1h-indazol-3-yl)-n-methylacetamide (CAS 1427962-22-8)
- 1-Benzyl-4-(2,4-dimethoxyphenyl)-3-methyl-4,5-dihydro-1H-1,2,4-triazol-5-one (CAS 861206-38-4)
Recommended Standards
- 2,4-Dioxo-7-phenyl-1-propyl-1h,2h,3h,4h-pyrido[2,3-d]pyrimidine-5-carboxylic acid (CAS 863667-95-2)
- 2-Hydroxyethyl 9-(2-carbamoylhydrazono)-9H-fluorene-4-carboxylate (CAS 303059-55-4)
- 2-((tert-Butoxycarbonyl)amino)-2-(3-(trifluoromethyl)cyclohexyl)acetic acid (CAS 2145574-11-2)
- 3-(1,3-benzodioxol-5-yl)-3-(1-oxo-1,3-dihydro-2H-isoindol-2-yl)propanoic acid (CAS 478079-06-0)
- 5,6-Diamino-1-benzyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one (CAS 59008-19-4)
- (9H-Fluoren-9-yl)methyl 4-hydrazinylpiperidine-1-carboxylate hydrochloride (CAS 205058-47-5)
- 4-[(4-Chlorophenyl)sulfanyl]-6-(methanesulfonylmethyl)-2-methylpyrimidine (CAS 338967-62-7)
- 2-Hydroxy-3,17β-O-bis(methoxymethyl)estradiol (CAS 217792-89-7)
- Erlotinib Impurity 51 (CAS CATO-C4X-106951)
- 4-(5-((2-((3-(1H-Imidazol-1-yl)propyl)amino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-3-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)butanoic acid (CAS 469879-39-8)
- 3-Bromo-4-methoxy-1H-pyrrolo[3,2-c]pyridine (CAS 1000341-22-9)
- D-Phenylalanine-4-sulfofluoride hydrochloride (CAS 1184173-19-0)
- (4,5-Difluoro-2-methoxyphenyl)methanamine (CAS 886497-93-4)
- Insulin Degludec Impurity 20 (CAS CATO-C4X-215720)
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