2-Methylquinoline-5-carboxylic acid CAS 634-39-9
| CAS No. | 634-39-9 |
| Molecular Formula | C11H9NO2 |
| Molecular Weight | 187.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 2-Methylquinoline-5-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 187.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
2-Methylquinoline-5-carboxylic acid (CAS 634-39-9) is a high-purity analytical reference standard with the molecular formula C11H9NO2 and a molecular weight of 187.19 g/mol.
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.
As a certified reference material (CRM), 2-Methylquinoline-5-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 | C11H9NO2 |
| Molecular Weight | 187.19 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Methylquinoline Standards
- 7-Methylquinoline-5-carboxylic acid (CAS 1016257-78-5)
- 5-Methylquinoline-2-carboxylic acid (CAS 103856-59-3)
- 4-Methylquinoline-3-carboxylic acid (CAS 103907-10-4)
- 6-Methylquinoline-5-carboxylic acid (CAS 1211488-26-4)
- 5-Methylquinoline-4-carboxylic acid (CAS 1474034-01-9)
- 6-Methylquinoline-2-carboxylic acid (CAS 15733-84-3)
- 3-Methylquinoline-4-carboxylic acid (CAS 1873-51-4)
- 4-Methylquinoline-5-carboxylic acid (CAS 1935554-00-9)
Recommended Standards
- 2-Methylquinoline-3-carboxylic acid (CAS 635-79-0)
- 2-Methylquinoline-7-carboxylic acid (CAS 475098-86-3)
- 2-Methylindolizine-1,3-dicarbaldehyde (CAS 357317-99-8)
- 2-Methylquinoline-8-carboxylic acid (CAS 634-37-7)
- N-(Benzoylphenyl)-2,2,2-trichloroacetamide (CAS 35382-88-8)
- cis-2-Aminocyclopropanecarboxylic acid (CAS 76455-37-3)
- 97033-11-9 (+/-)-4-tert-Butyl-azetidin-2-one MFCD19218563 (CAS 97033-11-9)
- Blonanserin Impurity 1 (CAS 132810-75-4)
- Leuprorelin Impurity 57 (CAS CATO-C4X-182257)
- 3-methylpyridin-4-ol (CAS 22280-02-0)
- (S)-Danicamtiv (CAS 1970972-75-8)
- N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2,6-dimethylmorpholine-4-carboxamide (CAS 865659-49-0)
- 4-(Butan-2-yl)benzaldehyde (CAS 28293-43-8)
- Tirzepatide Impurity 35 (CAS CATO-C4X-324035)
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