4-Bromo-1-ethyl-5-fluoro-1h-pyrazole CAS 1392274-45-1
| CAS No. | 1392274-45-1 |
| Molecular Formula | C5H6BrFN2 |
| Molecular Weight | 193.02 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Bromo-1-ethyl-5-fluoro-1h-pyrazole (CAS 1392274-45-1), molecular formula C5H6BrFN2 and molecular weight 193.02 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C5H6BrFN2, 4-Bromo-1-ethyl-5-fluoro-1h-pyrazole contains a nitrile group, fluorine/bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 193.02 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C5H6BrFN2 |
| Molecular Weight | 193.02 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | F/Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 4-Bromo-1-(2-fluoroethyl)-1h-pyrazole (CAS 1049730-35-9)
- 4-Bromo-5-fluoro-1,3-dimethyl-1h-pyrazole (CAS 1392274-42-8)
- 5-Bromo-1,3,4-thiadiazole-2-carbaldehyde (CAS 1547015-45-1)
- 3-bromo-2,5,6-trideuterio-4-fluoro-aniline (CAS 2127415-60-3)
- 2-bromo-1-(oxolan-3-yl)ethan-1-one (CAS 1101023-98-6)
- (R)-3-Bromo-4,4-dimethyldihydrofuran-2(3H)-one (CAS 1217724-84-9)
- 2-Bromo-5,8-dioxaspiro[3.4]octane (CAS 1257996-82-9)
- 5-bromo-2-methyl-pyrazole-3-carbaldehyde (CAS 1367843-92-2)
Recommended Standards
- 1-(2-Bromoethyl)-4-fluoro-1H-pyrazole (CAS 1207961-53-2)
- 2-(4-Chloro-3-methyl-1H-pyrazol-1-yl)acetyl chloride (CAS 1002534-97-5)
- 2,4-Dichloro-6-(methoxymethyl)pyrimidine (CAS 1037543-27-3)
- 4-(Ethylcarbamoyl)phenylboronic Acid (CAS 850568-12-6)
- 2-(4-Methoxyphenyl)cyclopropan-1-amine (CAS 19009-68-8)
- 2-Chloro-5-iodo-N-methylpyrimidin-4-amine (CAS 1093847-70-1)
- N-(6-Amino-5-cyclopropoxypyridin-2-yl)methanesulfonamide (CAS 1243451-92-4)
- (R)-2-Amino-3-mercaptopropan-1-ol (CAS 125509-78-6)
- 2-Cyano-4-methoxyphenylboronic Acid (CAS 1233968-22-3)
- 3-(3,4-Difluorophenoxy)propan-1-amine (CAS 950644-35-6)
- N-Tosyl-L-glutamic Acid (CAS 4816-80-2)
- (5E)-5-[(Dimethylamino)methylidene]-1-(4-methylphenyl)-2-phenyl-4,5,6,7-tetrahydro-1H-indol-4-one (CAS 338397-33-4)
- 4-Chloro-7H-pyrrolo[2,3-d]pyrimidin-5-amine (CAS 1092352-49-2)
- Insulin Degludec Impurity 27 (CAS CATO-C4X-215727)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com