1-(1-(4-Fluorophenyl)-1H-pyrazol-4-yl)ethan-1-one CAS 1177283-25-8
| CAS No. | 1177283-25-8 |
| Molecular Formula | C11H9FN2O |
| Molecular Weight | 204.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-(1-(4-Fluorophenyl)-1H-pyrazol-4-yl)ethan-1-one (CAS 1177283-25-8) is a high-purity analytical reference standard with the molecular formula C11H9FN2O and a molecular weight of 204.20 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, 1-(1-(4-Fluorophenyl)-1H-pyrazol-4-yl)ethan-1-one is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 204.20 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
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 | C11H9FN2O |
| Molecular Weight | 204.20 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Fluorophenyl Standards
- 1-(4-Fluorophenyl)-5-oxopyrrolidine-3-carbonitrile (CAS 1017458-39-7)
- 1-[(2-fluorophenyl)methyl]-1h-pyrazole-4-carbaldehyde (CAS 1044661-39-3)
- 1-(3-fluorophenyl)-3-methyl-1H-pyrazole-4-carbaldehyde (CAS 1143517-63-8)
- 1-(2-Fluorophenyl)-3-methyl-1h-pyrazole-4-carbaldehyde (CAS 1152505-24-2)
- 3-(3-Fluorophenyl)-1-methyl-1H-pyrazole-4-carbaldehyde (CAS 1152508-36-5)
- 1-(1-(2-Fluorophenyl)-1H-pyrazol-4-yl)ethan-1-one (CAS 1177325-28-8)
- 6-(3-Fluorophenyl)pyrimidine-2,4-diamine (CAS 1247114-85-7)
- 1-(2-Fluorophenyl)-4-oxopyrrolidine-3-carbonitrile (CAS 1312133-27-9)
Recommended Standards
- 1-[5-Fluoro-2-(1h-pyrazol-1-yl)phenyl]ethan-1-one (CAS 1152964-36-7)
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- 5-Fluoro-2-(4-methyl-1h-pyrazol-1-yl)benzaldehyde (CAS 1179794-27-4)
- 4-(3-Fluorobenzoyl)-1-methyl-1h-pyrazole (CAS 1152836-01-5)
- 4,6-Dibromo-2-(3-chloro-4-methylphenyl)benzo[d]oxazol-5-amine (CAS 637303-15-2)
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- 5-Chloro-3-methylbenzene-1,2-diamine hydrochloride (CAS 1269383-47-2)
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