Ethyl 5,8-dimethoxyquinoline-3-carboxylate CAS 71083-24-4
| CAS No. | 71083-24-4 |
| Molecular Formula | C14H15NO4 |
| Molecular Weight | 261.27 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Ethyl 5,8-dimethoxyquinoline-3-carboxylate (CAS 71083-24-4), molecular formula C14H15NO4 and molecular weight 261.27 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C14H15NO4, Ethyl 5,8-dimethoxyquinoline-3-carboxylate contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 261.27 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C14H15NO4 |
| Molecular Weight | 261.27 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.) | 1977 |
| Nitrogen Atoms | 1 |
Related Ethyl Standards
- Ethyl 6,7-Dimethoxyquinoline-3-carboxylate (CAS 5278-39-7)
- Methyl 3,8-dimethoxyquinoline-6-carboxylate (CAS 2721376-44-7)
- Methyl 4,8-Dimethoxyquinoline-2-carboxylate (CAS 76995-87-4)
- 3-Benzyl-2,6-dimethoxyquinoline (CAS 918518-76-0)
- 6,7-Dimethoxyquinoline-2-carboxylic acid (CAS 122234-49-5)
- 2,6-Dimethoxyquinoline-3-carboxylic acid (CAS 929343-44-2)
- 4,6-dimethoxyquinoline-2-carboxylic acid (CAS 52144-22-6)
- 4,8-Dimethoxyquinoline-2-carboxylic acid (CAS 28027-15-8)
Recommended Standards
- Ethyl 5-(2-ethoxyphenyl)isoxazole-3-carboxylate (CAS 668971-91-3)
- Ethyl 5-acetamido-3-methylbenzofuran-2-carboxylate (CAS 99252-61-6)
- Ethyl 5-(1-hydroxyethyl)-3-phenylisoxazole-4-carboxylate (CAS 95104-45-3)
- Ethyl 4-methoxy-5-oxo-1-phenyl-2,5-dihydro-1H-pyrrole-3-carboxylate (CAS 860362-27-2)
- 2-Ethyl-5,8-dihydroquinoxaline (CAS 65129-01-3)
- 6,8-Dibromo-3-(4-methylbenzyl)quinazolin-4(3H)-one (CAS 302913-36-6)
- 3-(1-(Chloromethyl)cyclopropyl)tetrahydrothiophene 1,1-dioxide (CAS 1478607-31-6)
- 1-(2-Chloroethyl)-2-imidazolidinone, 97% (CAS 2387-20-4)
- 1-(Cyclopentylcarbonyl)indolin-6-amine (CAS 1019533-47-1)
- 1-(2-Methyl-4-nitrophenyl)-1H-imidazole (CAS 154164-39-3)
- Ethyl (s)-3-amino-3-(5-methylfuran-2-yl)propanoate (CAS 1307161-74-5)
- 2-Methoxy-2-morpholinomethyl benzophenone (CAS 898749-96-7)
- 2-(2-Chloroethyl)naphthalene (CAS 20849-71-2)
- Tirzepatide Impurity 14 (CAS CATO-C4X-324014)
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