6-Methoxy-2-(p-tolyl)quinoline-4-carboxylic acid CAS 18193-09-4
| CAS No. | 18193-09-4 |
| Molecular Formula | C35H54N4O7 |
| Molecular Weight | 642.83 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
6-Methoxy-2-(p-tolyl)quinoline-4-carboxylic acid (CAS 18193-09-4), molecular formula C35H54N4O7 and molecular weight 642.83 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, 6-Methoxy-2-(p-tolyl)quinoline-4-carboxylic acid is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 642.83 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).
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), 6-Methoxy-2-(p-tolyl)quinoline-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 | C35H54N4O7 |
| Molecular Weight | 642.83 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 4 |
Related Methoxy Standards
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Recommended Standards
- PDI45 (CAS 110613-98-4)
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- Moxidectin-d3 (CAS 113507-06-5 (unlabelled))
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- 3-(3-Fluoro-5-methylphenyl)-2-methyl-1-propene (CAS 951888-93-0)
- 2-(Aminomethyl)benzo[d]oxazole-5-carboxaldehyde (CAS 1780245-95-5)
- N-(4-Methoxyphenyl)acridin-9-amine (CAS 61421-82-7)
- 5-(Naphthalen-1-yl)-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-3-carbonyl chloride (CAS 865424-05-1)
- 3,5-Dibromo-2,4-difluorotoluene (CAS 1806294-39-2)
- Methyltitanium(IV) chloride (CAS 2747-38-8)
- 137644-29-2 6-hydroxy-5-sulfonaphthalene-2-carboxylic acid TS-00876 (CAS 137644-29-2)
- 3,4-Diethyl (3S,4S)-1-benzylpyrrolidine-3,4-dicarboxylate (CAS 112794-79-3)
- Peptide 440 (CAS CATO-CPTD788440)
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