3,4-Dihydroxyquinoline-2-carboxylic acid CAS 33925-79-0
| CAS No. | 33925-79-0 |
| Molecular Formula | C10H7NO4 |
| Molecular Weight | 205.17 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.
3,4-Dihydroxyquinoline-2-carboxylic acid (CAS 33925-79-0), molecular formula C10H7NO4 and molecular weight 205.17 g/mol, is a CATO reference standard with documented purity and traceability.
3,4-Dihydroxyquinoline-2-carboxylic acid (C10H7NO4) contains an amino-acid-derived structure, 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 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), 3,4-Dihydroxyquinoline-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.
Physical & Chemical Properties
| Molecular Formula | C10H7NO4 |
| Molecular Weight | 205.17 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| 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.) | 1966 |
| Nitrogen Atoms | 1 |
Related Dihydroxyquinoline Standards
- 4,8-Dihydroxyquinoline-3-carboxylic acid (CAS 1131580-58-9)
- 6,7-Dihydroxyquinoline-2-carboxylic acid (CAS 122234-87-1)
- 3,4-Dihydroxyquinoline-5-carboxylic acid (CAS 127980-50-1)
- 4,5-Dihydroxyquinoline-3-carboxylic acid (CAS 79148-46-2)
- 4,6-Dihydroxyquinoline-2-carboxylic acid (CAS 3778-29-8)
- 6,8-Dihydroxyquinoline-2-carboxylic acid (CAS 63713-29-1)
- 6,7-Dihydroxyquinoline-3-carboxamide (CAS 146515-41-5)
- Methyl 2,4-dihydroxyquinoline-3-carboxylate (CAS 73776-19-9)
Recommended Standards
- 3-(5-amino-1H-1,2,3,4-tetrazol-1-yl)benzoic acid (CAS 1989671-38-6)
- 3-[(1H-1,2,3,4-tetrazol-5-yl)amino]benzoic acid (CAS 199535-07-4)
- 3-(4-Nitrophenyl)-1H-pyrazol-5(4H)-one (CAS 54945-13-0)
- 3-Hydroxy-2-oxo-1,2-dihydroquinoline-4-carboxylic acid (CAS 91587-89-2)
- 3-Amino-5-chloro-1-methyl-1H-pyrazole (CAS 1191453-81-2)
- 5-(Piperidin-4-yl)-3-(pyrazin-2-yl)-1,2,4-oxadiazole (CAS 849925-00-4)
- 2-(bromomethyl)piperidine (CAS 3433-38-3)
- tert-Butyl 4-(2-hydroxyethyl)-4-(2-hydroxypropan-2-yl)piperidine-1-carboxylate (CAS 374794-97-5)
- 1-Bromo-3-Phenoxybenzene (CAS 6876-00-2)
- 4-Iodo-5-methylimidazole (CAS 15813-07-7)
- 6-Ethyl-N2,N2,N4,N4-tetramethylpyrimidine-2,4,5-triamine (CAS 830321-56-7)
- Landiolol Impurity 65 (CAS CATO-C4X-262165)
- 4-(3,4-Dichlorophenoxy)butanenitrile (CAS 1184500-18-2)
- Peptide 435 (CAS CATO-CPTD788435)
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