≥99% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Argon charged,Room temperature Ships Normal Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
4-Bromopyrazole is a heteroaryl halide and its cyanation in the presence of palladium catalysts has been reported. 4-Bromopyrazole is a pyrazole derivative. It is reported to react with titanium tetrachloride to afford binary adducts. Mutagenicity of 4-bromopyrazole has been tested using the L-arabinose forward mutation assay of Salmonella typhimurium. It is reported to inhibit the oxidative phosphorylation, the ATP-32P exchange reaction, and energy dependent and independent calcium uptake.
Starting material employed in a synthesis of 1,4′-bipyrazoles.
| Pubchem Sid | 488182239 |
|---|---|
| Pubchem Sid Url | https://pubchem.ncbi.nlm.nih.gov/substance/488182239 |
| Canonical Smiles | C1=C(C=NN1)Br |
| IUPAC Name | 4-bromo-1H-pyrazole |
| InChIKey | WVGCPEDBFHEHEZ-UHFFFAOYSA-N |
| INCHI | 1S/C3H3BrN2/c4-3-1-5-6-2-3/h1-2H,(H,5,6) |
| Isomeric SMILES | C1=C(C=NN1)Br |
| WGK Germany | 3 |
| RTECS | UQ6200000 |
| Molecular Weight | 146.97 |
| Reaxy-Rn | 106510 |
| Reaxys-RN_link_address | https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=106510&ln= |
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Organohalogen compounds |
| Class | Aryl halides |
| Subclass | Aryl bromides |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Aryl bromides |
| Alternative Parents | Pyrazoles Heteroaromatic compounds Azacyclic compounds Organopnictogen compounds Organonitrogen compounds Organobromides Hydrocarbon derivatives |
| Molecular Framework | Aromatic heteromonocyclic compounds |
| Substituents | Aryl bromide - Heteroaromatic compound - Pyrazole - Azole - Azacycle - Organoheterocyclic compound - Organic nitrogen compound - Organopnictogen compound - Hydrocarbon derivative - Organonitrogen compound - Organobromide - Aromatic heteromonocyclic compound |
| Description | This compound belongs to the class of organic compounds known as aryl bromides. These are organic compounds containing the acyl bromide functional group. |
| External Descriptors | Not available |
Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
 F2210554 | Certificate of Analysis | Dec 10, 2025 | B119149 |
| F2210555 | Certificate of Analysis | Dec 10, 2025 | B119149 |
| F2210556 | Certificate of Analysis | Dec 10, 2025 | B119149 |
| F2210620 | Certificate of Analysis | Dec 10, 2025 | B119149 |
| F2210636 | Certificate of Analysis | Dec 10, 2025 | B119149 |
| H2508150 | Certificate of Analysis | Aug 12, 2025 | B119149 |
| H2130388 | Certificate of Analysis | Mar 04, 2025 | B119149 |
| K1701091 | Certificate of Analysis | Dec 04, 2024 | B119149 |
| E1930264 | Certificate of Analysis | Oct 09, 2024 | B119149 |
| F1525001 | Certificate of Analysis | Aug 19, 2024 | B119149 |
| D2418620 | Certificate of Analysis | Mar 25, 2024 | B119149 |
| D2418622 | Certificate of Analysis | Mar 25, 2024 | B119149 |
| E2325234 | Certificate of Analysis | Mar 18, 2022 | B119149 |
| E2325242 | Certificate of Analysis | Mar 18, 2022 | B119149 |
| E2325244 | Certificate of Analysis | Mar 18, 2022 | B119149 |
| Solubility | Slightly soluble in water. |
|---|---|
| Sensitivity | air sensitive |
| Boil Point(°C) | 250-260°C |
| Melt Point(°C) | 93-96°C |
| Molecular Weight | 146.970 g/mol |
| XLogP3 | 0.300 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 1 |
| Rotatable Bond Count | 0 |
| Exact Mass | 145.948 Da |
| Monoisotopic Mass | 145.948 Da |
| Topological Polar Surface Area | 28.700 Ų |
| Heavy Atom Count | 6 |
| Formal Charge | 0 |
| Complexity | 48.100 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 1 |
