3-Ethyl-1-(3-fluorophenyl)-4,5-dihydro-1H-pyrazol-5-one CAS 1251129-29-9
| CAS No. | 1251129-29-9 |
| Molecular Formula | C11H11FN2O |
| Molecular Weight | 206.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 206.22 g/mol gives 3-Ethyl-1-(3-fluorophenyl)-4,5-dihydro-1H-pyrazol-5-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 3-Ethyl-1-(3-fluorophenyl)-4,5-dihydro-1H-pyrazol-5-one (CAS 1251129-29-9), a certified reference material (molecular formula C11H11FN2O, MW 206.22 g/mol) for analytical method development and quality control.
3-Ethyl-1-(3-fluorophenyl)-4,5-dihydro-1H-pyrazol-5-one (C11H11FN2O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 3-Ethyl-1-(3-fluorophenyl)-4,5-dihydro-1H-pyrazol-5-one 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 | C11H11FN2O |
| Molecular Weight | 206.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- 2-[2-(4-Fluorophenyl)-1,3-oxazol-4-yl]ethan-1-amine (CAS 1016734-82-9)
- [2-(4-fluorophenyl)-5-methyl-1,3-oxazol-4-yl]methanamine (CAS 1048917-47-0)
- (1-(4-Fluorophenyl)-5-methyl-1H-1,2,3-triazol-4-yl)methanamine (CAS 1049131-33-0)
- 3-Ethyl-1-(4-fluorophenyl)-4,5-dihydro-1H-pyrazol-5-one (CAS 1049162-32-4)
- 3-Ethyl-1-(2-fluorophenyl)-4,5-dihydro-1H-pyrazol-5-one (CAS 1092305-53-7)
- (4-Fluorophenyl)(1-methyl-1H-imidazol-2-yl)methanol (CAS 122155-26-4)
- (1-(2-Fluorophenyl)-5-methyl-1H-1,2,3-triazol-4-yl)methanamine (CAS 1267357-55-0)
- (1-(3-Fluorophenyl)-5-methyl-1H-1,2,3-triazol-4-yl)methanamine (CAS 1267359-29-4)
Recommended Standards
- (1-(5-Fluoro-2-methylphenyl)-1H-1,2,3-triazol-4-yl)methanamine (CAS 1251109-56-4)
- (1-(3-Fluoro-2-methylphenyl)-1H-1,2,3-triazol-4-yl)methanamine (CAS 1251294-45-7)
- (1-(4-Fluorobenzyl)-1h-1,2,3-triazol-4-yl)methanamine (CAS 1250599-01-9)
- 5-(2-Hydroxypyrimidin-5-yl)thiophene-2-carbaldehyde (CAS 1261952-75-3)
- 6-Chloro-4-hydroxy-3-nitro-2H-chromen-2-one (CAS 24922-34-7)
- (2S,4R)-3-Benzoyl-4-ethyl-4-methyl-2-phenyloxazolidin-5-one (CAS 118995-18-9)
- Demethoxypiplartine (CAS 130263-10-4)
- 2,5-Dichlorophenol Acetate (CAS 30124-46-0)
- (5,6,7,8-Tetrahydro-[1,8]naphthyridin-2-yl)-acetic acid (CAS 445490-61-9)
- 3,5,7-Trichloro-1,6-naphthyridin-2(1H)-one (CAS 2763156-08-5)
- 3-(1-Boc-4-piperidyl)-1-propanol (CAS 156185-63-6)
- 5-Amino-6-oxo-1,6-dihydropyridine-3-carbonitrile (CAS 1695866-72-8)
- (4-Bromo-1h-pyrrol-2-yl)(piperidin-1-yl)methanone (CAS 900019-45-6)
- Insulin Degludec Impurity 13 (CAS CATO-C4X-215713)
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