Ethyl 5-(4-fluorophenyl)-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylate CAS 126839-63-2
| CAS No. | 126839-63-2 |
| Molecular Formula | C19H17FN2O3 |
| Molecular Weight | 340.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Ethyl 5-(4-fluorophenyl)-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylate.
Ethyl 5-(4-fluorophenyl)-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylate (CAS 126839-63-2) is a high-purity analytical reference standard with the molecular formula C19H17FN2O3 and a molecular weight of 340.35 g/mol.
Ethyl 5-(4-fluorophenyl)-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylate (C19H17FN2O3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, 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.
CATO manufactures Ethyl 5-(4-fluorophenyl)-1-(4-methoxyphenyl)-1H-pyrazole-3-carboxylate under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C19H17FN2O3 |
| Molecular Weight | 340.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- 4-(4-Fluorophenyl)-5-[(1E)-(methoxyimino)methyl]-1-(4-methoxyphenyl)-2,3-dihydro-1H-pyrrol-2-one (CAS 338793-31-0)
- 5-[2,5-Bis(4-fluorophenyl)-3-thienyl]-1H-tetrazole (CAS 908849-28-5)
- Ethyl 4-(4-fluorophenyl)-6-hydroxy-2-phenyl-4,5-dihydro-5-pyrimidinecarboxylate (CAS 477867-27-9)
- (E)-1-(4-fluorophenyl)-2-((5-styryl-1,3,4-oxadiazol-2-yl)thio)ethan-1-one (CAS 692287-92-6)
- N-(2-Fluorophenyl)-2-((6-(pyridin-4-yl)pyridazin-3-yl)thio)acetamide (CAS 872702-06-2)
- 1-(4-(4-Fluorophenyl)-6-(trifluoromethyl)pyrimidin-2-yl)piperidin-4-amine (CAS 1018143-48-0)
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Recommended Standards
- tert-Butyl 4-(2-fluoro-6-nitrophenoxy)piperidine-1-carboxylate (CAS 1233958-46-7)
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- tert-Butyl 4-(4-fluoro-2-nitrophenoxy)piperidine-1-carboxylate (CAS 1233955-13-9)
- N-(2-fluorobenzyl)-1-(2-hydroxy-2-phenylethyl)-1H-1,2,3-triazole-4-carboxamide (CAS 1396748-22-3)
- Methyl 2-amino-2-(3-methoxyphenyl)acetate (CAS 43189-19-1)
- Tert-butyl 1-oxa-4,8-diazaspiro[4.5]Decane-8-carboxylate (CAS 886360-95-8)
- 7-Fluoroimidazo[1,2-a]pyridine-3-carboxylic acid ethyl ester (CAS 1313408-99-9)
- Methyl 3-amino-5-bromobenzoate hydrochloride (CAS 1881330-74-0)
- Monobutyltin (CAS 2406-65-7)
- Sotagliflozin-D4 (CAS 1018899-04-1 (unlabeled))
- tert-Butyl spiro[2.3]hexan-5-ylcarbamate (CAS 1420270-95-6)
- Methyl 4-(Benzylamino)-3-nitrobenzoate (CAS 68502-46-5)
- (2-Amino-5-(trifluoromethyl)phenyl)(phenyl)methanone (CAS 732-34-3)
- (D-His1)-Exenatide trifluoroacetate salt (CAS 1678417-09-8)
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