5-Isobutyl-1-phenyl-1H-pyrazole-3-carboxylic acid CAS 3191-85-3
| CAS No. | 3191-85-3 |
| Molecular Formula | C14H16N2O2 |
| Molecular Weight | 244.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-Isobutyl-1-phenyl-1H-pyrazole-3-carboxylic acid (CAS 3191-85-3), a certified reference material (molecular formula C14H16N2O2, MW 244.29 g/mol) for analytical method development and quality control.
5-Isobutyl-1-phenyl-1H-pyrazole-3-carboxylic acid (C14H16N2O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, 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).
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), 5-Isobutyl-1-phenyl-1H-pyrazole-3-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 | C14H16N2O2 |
| Molecular Weight | 244.29 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 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
Related Isobutyl Standards
- Isobutyl heptyl oxalate (CAS 959311-19-4)
- 2-Isobutyl-1,2,3,4-tetrahydrobenzo[4,5]imidazo[1,2-a]pyrazin-8-amine (CAS 1322604-61-4)
- 1242864-83-0 2-Isobutyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indol-8-amine MFCD15732440 (CAS 1242864-83-0)
- N-Isobutyl-4-methoxybenzenesulfonamide (CAS 172738-60-2)
- 2-Isobutyl-1-oxo-1,2-dihydroisoquinoline-4-carboxylic acid (CAS 896630-65-2)
- n-Isobutyl-3-phenyl-1h-pyrazole-4-carboxamide (CAS 1015515-13-5)
- n-Isobutyl-3-phenylfuran-2-carboxamide (CAS 1016052-70-2)
- n-Isobutyl-4-(1h-pyrazol-1-yl)benzamide (CAS 1135082-39-1)
Recommended Standards
- 5-Chrysenol (CAS 84498-34-0)
- 5-Isopropyl-7-methyl-2H-naphtho[1,8-bc]furan-3,4-diol (CAS 57765-65-8)
- 5-Benzyl-3a-methyltetrahydropyrrolo[3,4-c]pyrrole-1,3(2H,3aH)-dione (CAS 2791272-34-7)
- 5-Methoxy-2-{[(4-methylpyridin-2-yl)amino]methyl}phenol (CAS 306730-32-5)
- Bedaquiline Impurity 7 (CAS 2752-87-6)
- 4-(4-Methyl-5-phenyl-1H-imidazol-2-yl)piperidine hydrochloride (CAS 1221722-45-7)
- 3-Bromo-4-chlorobenzonitrile (CAS 948549-53-9)
- 1-(1-Cyclopropyl-1H-pyrazol-4-yl)ethan-1-one (CAS 1784673-98-8)
- Bazedoxifene Acetate Impurity 2 (CAS 223251-25-0)
- 6-Chloro-3-(pyridin-3-ylmethyl)-3,4-dihydro-2H-[1,3]oxazino[5,6-h]quinoline (CAS 438486-28-3)
- n-(4-Methoxybutyl)-1-methylpiperidin-4-amine (CAS 1251267-62-5)
- (2,6-Difluorobenzyl)hydrazine (CAS 887595-42-8)
- Cellobiose Impurity 2 (CAS 6380-97-8)
- Des-Trp25-Tirzepatide (CAS CATO-CPTD788948)
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