2-Hydroxy-7-methoxyquinoline-4-carboxylic acid CAS 72784-23-7
| CAS No. | 72784-23-7 |
| Molecular Formula | C11H9NO4 |
| Molecular Weight | 219.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
2-Hydroxy-7-methoxyquinoline-4-carboxylic acid (CAS 72784-23-7), molecular formula C11H9NO4 and molecular weight 219.19 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-Hydroxy-7-methoxyquinoline-4-carboxylic acid (C11H9NO4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 219.19 g/mol, it falls into the medium-molecular-weight range. 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).
As a certified reference material (CRM), 2-Hydroxy-7-methoxyquinoline-4-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 | 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.) | 1977 |
| Nitrogen Atoms | 1 |
Related Hydroxy Standards
- 2-(7-Hydroxy-2-oxo-2h-chromen-4-yl)acetamide (CAS 101999-45-5)
- 4-Hydroxy-7-methoxyquinoline-6-carboxylic acid (CAS 1190837-18-3)
- N-(4-hydroxy-2-oxo-2H-chromen-3-yl)acetamide (CAS 13948-45-3)
- Methyl 4-hydroxy-1-oxo-1,2-dihydroisoquinoline-3-carboxylate (CAS 13972-97-9)
- 3-hydroxy-7-methoxyquinoline-4-carboxylic acid (CAS 1487292-95-4)
- 5-Hydroxy-3-phenylisoxazole-4-carboxylic acid (CAS 15969-44-5)
- 2-Hydroxy-8-methoxyquinoline-3-carboxylic acid (CAS 169321-92-0)
- 5-Hydroxy-2-methyl-1-oxo-1,2-dihydroisoquinoline-6-carboxylic acid (CAS 1783406-37-0)
Recommended Standards
- 2-Hydroxy-6-methoxy-quinoline-4-carboxylic acid (CAS 32431-29-1)
- 2-Methyl-5-nitrobenzene-1-sulfonyl fluoride (CAS 453-53-2)
- 2-fluoro-4-sulfamoylbenzoic acid (CAS 714968-42-0)
- 3-(2,3-Dioxoindolin-1-yl)propanoic acid (CAS 81250-90-0)
- 2-(tert-Butyl)oxazolo[4,5-c]pyridine (CAS 873914-35-3)
- 2-(Tert-butyl)-1-methylcyclohexan-1-ol (CAS 72183-73-4)
- 2-(3-(3-Fluorophenyl)-7-oxo-3,7-dihydro-6H-[1,2,3]triazolo[4,5-d]pyrimidin-6-yl)acetonitrile (CAS 872590-63-1)
- 4-Nitro-3-(4H-1,2,4-triazol-4-yl)-1H-pyrazole-5-carboxylic acid (CAS 1258002-57-1)
- 5-Chloro-6-(trifluoromethyl)pyridin-3-ol (CAS 1355067-47-8)
- N,N,N-Trimethyl-3-oxo-3-phenylpropan-1-aminium chloride (CAS 67190-44-7)
- Ethyl 7-Chloroindole-3-carboxylate (CAS 1260757-13-8)
- 4,4,5,5-Tetramethyl-2-(2-vinylphenyl)-1,3,2-dioxaborolane (CAS 910242-00-1)
- 4-Fluoro-2-vinylpyridine (CAS 2228945-29-5)
- Tirzepatide Impurity 61 (CAS CATO-C4X-324061)
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