ethyl 5-amino-1-(3-fluorophenyl)pyrazole-4-carboxylate CAS 138907-70-7
| CAS No. | 138907-70-7 |
| Molecular Formula | C12H12FN3O2 |
| Molecular Weight | 249.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
ethyl 5-amino-1-(3-fluorophenyl)pyrazole-4-carboxylate (C12H12FN3O2) contains a nitrogen-containing heterocyclic scaffold, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
ethyl 5-amino-1-(3-fluorophenyl)pyrazole-4-carboxylate (CAS 138907-70-7) is a high-purity analytical reference standard with the molecular formula C12H12FN3O2 and a molecular weight of 249.24 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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.
Physical & Chemical Properties
| Molecular Formula | C12H12FN3O2 |
| Molecular Weight | 249.24 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, 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.) | 1996 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related ethyl Standards
- Ethyl 5-amino-1-(4-fluorophenyl)-1H-pyrazole-3-carboxylate (CAS 1264046-99-2)
- Ethyl 5-amino-1-(3-fluorophenyl)-1H-pyrazole-3-carboxylate (CAS 1264049-14-0)
- ethyl 5-amino-1-(2-fluorophenyl)-1H-imidazole-4-carboxylate (CAS 1283340-97-5)
- Ethyl 5-amino-1-(4-fluorophenyl)-1H-pyrazole-4-carboxylate (CAS 138907-68-3)
- Methyl 5-amino-1-(4-fluoro-2-methylphenyl)-1H-pyrazole-4-carboxylate (CAS 1416344-05-2)
- Methyl 5-amino-1-(3-fluoro-4-methylphenyl)-1H-pyrazole-4-carboxylate (CAS 1416344-39-2)
- Ethyl 1-(4-amino-2-fluorophenyl)-1H-pyrazole-3-carboxylate (CAS 1946828-16-5)
- Ethyl 1-(4-amino-2-fluorophenyl)-1H-pyrazole-4-carboxylate (CAS 219664-24-1)
Recommended Standards
- (S)-3-((tert-Butoxycarbonyl)amino)-5-fluoro-4-oxopentanoic acid (CAS 138550-45-5)
- Methyl 5-(5-fluoro-2-methoxyphenyl)-1H-pyrrole-2-carboxylate (CAS 1361004-24-1)
- 1-(2-Aminoethyl)-4-(2-fluorophenyl)pyrazine-2,3(1H,4H)-dione (CAS 1707372-99-3)
- 4-Ethoxy-6-fluoro-8-methylquinoline-2-carboxylic acid (CAS 1338660-44-8)
- Diethyl 2-(((4-chloro-2-methylphenyl)amino)methylene)malonate (CAS 103976-13-2)
- N-Ethyl-5-methyl-3,6-diphenylpyridazin-4-amine (CAS 60326-06-9)
- 1-Boc-5-fluoro-3-indazole-carboxylic Acid (CAS 886368-29-2)
- 4-Iodo-2-methylbenzothiazole (CAS 1261740-11-7)
- Methyl Quinoline-6-carboxylate (CAS 38896-30-9)
- 1-(1H-Imidazol-2-yl)ethanamine (CAS 1154736-07-8)
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- (1-((4-Chlorophenyl)sulfonyl)piperidin-3-yl)methanol (CAS 349098-57-3)
- 2-amino-1,1,2,3,3-pentadeuterio-propane-1,3-diol (CAS 2708287-37-8)
- [γ-Glu]15 Semaglutide (CAS CATO-C4X-222690)
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