3-Bromo-5-fluoro-4H-1,2,4-triazole CAS 42297-30-3
| CAS No. | 42297-30-3 |
| Molecular Formula | C2HBrFN3 |
| Molecular Weight | 165.95 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 165.95 g/mol gives 3-Bromo-5-fluoro-4H-1,2,4-triazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3-Bromo-5-fluoro-4H-1,2,4-triazole (CAS 42297-30-3) is a high-purity analytical reference standard with the molecular formula C2HBrFN3 and a molecular weight of 165.95 g/mol.
Based on its molecular formula C2HBrFN3, 3-Bromo-5-fluoro-4H-1,2,4-triazole contains a nitrile group, fluorine/bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 165.95 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).
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 | C2HBrFN3 |
| Molecular Weight | 165.95 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.) | 1969 |
| Halogen Content | F/Br-containing |
| Nitrogen Atoms | 3 |
Related Bromo Standards
- 3-bromo-1H-pyrazol-4-amine (CAS 1374394-78-1)
- 5-Bromo-1-methyl-1H-1,2,4-triazole (CAS 16681-72-4)
- 5-bromo-1-methyl-triazole (CAS 16681-82-6)
- 2-Bromo-2-methylpropanamide (CAS 7462-74-0)
- 2-Bromo-N,N-dimethylacetamide (CAS 5468-77-9)
- 2-Bromo-N-ethylacetamide (CAS 5327-00-4)
- 2-Bromo-n-methylpropanamide (CAS 74538-22-0)
- 4-bromo-5-methyl-2H-triazole (CAS 805315-83-7)
Recommended Standards
- silver thiocyanate (CAS 1701-93-5)
- 3-Chloroisoxazole-5-carbonyl chloride (CAS 104164-45-6)
- Eltrombopag Impurity 31 (CAS 25487-66-5)
- 3,4-Dichloro-1H-pyrrole-2,5-dione (CAS 1193-54-0)
- 2-(2,2-Dioxo-2lambda6-thia-3-azatricyclo[6.3.1.0,4,12]dodeca-1(11),4(12),5,7,9-pentaen-3-yl)acetohydrazide (CAS 790271-29-3)
- 1-((3-Chloro-5-(trifluoromethyl)pyridin-2-yl)methyl)piperidin-4-one (CAS 1057282-45-7)
- (R)-1-(4-Cyclopentylfuran-2-yl)propan-1-amine (CAS 608537-92-4)
- Methyl 2-((2-oxopropyl)thio)benzoate (CAS 53278-21-0)
- [1-[[(3R)-3-fluoropyrrolidin-1-yl]methyl]cyclopropyl]methanol (CAS 2561517-87-9)
- Ethyl 2-(2-cyanophenyl)acetate (CAS 67237-76-7)
- 1-((Benzyloxy)carbonyl)-5,5-difluoropiperidine-2-carboxylic acid (CAS 1543789-74-7)
- Methyl 5-bromo-2-methoxypyrimidine-4-carboxylate (CAS 1398504-36-3)
- 3-(4-Ethoxy-3-methoxyphenyl)-3-(1-oxoisoindolin-2-yl)propanoic acid (CAS 885951-50-8)
- Tau Peptide (306-336) (Repeat 3 Domain) trifluoroacetate salt (CAS 330456-26-3)
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