4-Methoxy-3-(1H-pyrazol-1-yl)benzoic acid CAS 1368829-85-9
| CAS No. | 1368829-85-9 |
| Molecular Formula | C11H10N2O3 |
| Molecular Weight | 218.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Methoxy-3-(1H-pyrazol-1-yl)benzoic acid (CAS 1368829-85-9), molecular formula C11H10N2O3 and molecular weight 218.21 g/mol, is a CATO reference standard with documented purity and traceability.
4-Methoxy-3-(1H-pyrazol-1-yl)benzoic acid (C11H10N2O3) 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 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), 4-Methoxy-3-(1H-pyrazol-1-yl)benzoic 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 | C11H10N2O3 |
| Molecular Weight | 218.21 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.) | 1991 |
| Nitrogen Atoms | 2 |
Related Methoxy Standards
- 2-(6-Methoxy-1H-indol-3-yl)-2-oxoacetamide (CAS 103858-66-8)
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- 3-Acetyl-8-methoxy-2H-cyclohepta[b]furan-2-one (CAS 1210-38-4)
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Recommended Standards
- 5-Hydroxy-1-(4-methylphenyl)-1H-pyrazole-4-carboxylic acid (CAS 1368456-42-1)
- 1-Benzyl-2-hydroxy-1h-imidazole-5-carboxylic acid (CAS 1368869-86-6)
- 5-(4-(Hydroxymethyl)phenyl)furan-2-carboxylic acid (CAS 1365988-43-7)
- 4-((1-Methyl-1H-tetrazol-5-yl)methoxy)benzaldehyde (CAS 1373247-65-4)
- 2-(methylamino)-4-phenyl-Thiazole (CAS 6142-11-6)
- N1-(2-Aminoethyl)benzene-1,2-diamine (CAS 128995-76-6)
- (1R,2R)-2-methylcyclopropan-1-amine hydrochloride (CAS 2044706-16-1)
- 7-Amino-1,2-dimethylquinolin-4(1H)-one (CAS 1708159-62-9)
- (2S)-2-(iodomethyl)oxetane (CAS 2199141-03-0)
- 7-fluoronaphthalen-1-ol (CAS 3132-92-1)
- 2-(Aminomethyl)-6-(trifluoromethyl)benzimidazole (CAS 944903-89-3)
- Fmoc-Phe(4-CH2NHBoc)-OH (CAS 204715-91-3)
- 2,6-Dimethyl-4-{5-[(1E)-{2-[4-(trifluoromethyl)phenyl]hydrazin-1-ylidene}methyl]-1,3-thiazol-2-yl}morpholine (CAS 400079-81-4)
- Peptide YY (canine, mouse, porcine, rat) trifluoroacetate salt (CAS 81858-94-8)
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