3-(2,4-Difluorophenyl)-1-methyl-1h-pyrazole-4-carboxylic acid CAS 1152508-27-4
| CAS No. | 1152508-27-4 |
| Molecular Formula | C11H8F2N2O2 |
| Molecular Weight | 238.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
3-(2,4-Difluorophenyl)-1-methyl-1h-pyrazole-4-carboxylic acid (CAS 1152508-27-4), molecular formula C11H8F2N2O2 and molecular weight 238.19 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H8F2N2O2, 3-(2,4-Difluorophenyl)-1-methyl-1h-pyrazole-4-carboxylic acid contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 238.19 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C11H8F2N2O2 |
| Molecular Weight | 238.19 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Difluorophenyl Standards
- 1-(2,4-Difluorophenyl)-3-methyl-1H-pyrazole-5-carboxylic acid (CAS 1020240-42-9)
- Methyl 5-(2,4-difluorophenyl)-1H-pyrazole-3-carboxylate (CAS 1119299-71-6)
- 3-(3,4-Difluorophenyl)-1-methyl-1H-pyrazole-5-carboxylic acid (CAS 1134692-74-2)
- 3-(2,6-Difluorophenyl)-1-methyl-1h-pyrazole-4-carboxylic acid (CAS 1152510-99-0)
- 3-(2,5-difluorophenyl)-1-methyl-1H-pyrazole-4-carboxylic acid (CAS 1152548-65-6)
- 1-(3,5-Difluorophenyl)-5-methyl-1H-pyrazole-4-carboxylic acid (CAS 1189749-72-1)
- 3-(2,4-Difluorophenyl)-1-methyl-1H-pyrazole-5-carboxylic acid (CAS 1204296-93-4)
- 3-(2,5-Difluorophenyl)-1-methyl-1h-pyrazole-5-carboxylic acid (CAS 1245171-63-4)
Recommended Standards
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- 5-(difluoromethyl)-1-phenyl-1H-pyrazole-4-carboxylic acid (CAS 1187935-84-7)
- 5-(Dimethylamino)-2-ethylphenol (CAS 855409-58-4)
- 4-chloropyrrolo[2,1-f][1,2,4]triazin-6-ol (CAS 1160995-28-7)
- 1-((4-Hydrazinylphenyl)sulfonyl)-4-methylpiperazine (CAS 184708-08-5)
- tert-Butyl 7-bromo-4-fluoro-3-iodo-1H-indole-1-carboxylate (CAS 1935172-10-3)
- 4-Fluoroisoquinoline-5-sulfonyl chloride, 97% (CAS 194032-33-2)
- 2,2-Dihydroxymalonaldehyde (CAS 4464-20-4)
- 4-(4-Methoxybenzyl)piperidine-4-carboxylic acidhydrochloride (CAS 1185301-08-9)
- 2,6-Dimethoxy-3,7-bis(methylseleno)-naphthalene (CAS 136559-37-0)
- 3-Cyclopropoxy-6-formyl-N-methylpicolinamide (CAS 1243464-34-7)
- [Glu]17-Liraglutide (CAS CATO-C4X-199236)
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