4-Bromopyrazole
- Product Name
- 4-Bromopyrazole
- CAS No.
- 2075-45-8
- Chemical Name
- 4-Bromopyrazole
- Synonyms
- 4-BROMO-1H-PYRAZOLE;DK660;93℃-96℃;NSC 522023;AKOS B001462;WLN: T5MNJ DE;4-Brompyrazole;4-BROMOPYRAZOLE;4-bromo-pyrazol;Baricitinib-001
- CBNumber
- CB6158239
- Molecular Formula
- C3H3BrN2
- Formula Weight
- 146.97
- MOL File
- 2075-45-8.mol
4-Bromopyrazole Property
- Melting point:
- 93-96 °C (lit.)
- Boiling point:
- 250-260 °C (lit.)
- Density
- 1.5979 (rough estimate)
- refractive index
- 1.5260 (estimate)
- storage temp.
- Inert atmosphere,Room Temperature
- solubility
- Chloroform, DMSO, Methanol
- form
- Crystalline Powder
- pka
- 12.71±0.50(Predicted)
- color
- White to cream
- Water Solubility
- Slightly soluble in water.
- InChI
- InChI=1S/C3H3BrN2/c4-3-1-5-6-2-3/h1-2H,(H,5,6)
- InChIKey
- FHZALEJIENDROK-UHFFFAOYSA-N
- SMILES
- N1C=C(Br)C=N1
- CAS DataBase Reference
- 2075-45-8(CAS DataBase Reference)
- NIST Chemistry Reference
- 1H-pyrazole, 4-bromo-(2075-45-8)
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash hands thoroughly after handling.
P264Wash skin thouroughly after handling.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- 374822
- Product name
- 4-Bromopyrazole
- Purity
- 99%
- Packaging
- 1g
- Price
- $21.36
- Updated
- 2025/07/31
- Product number
- 374822
- Product name
- 4-Bromopyrazole
- Purity
- 99%
- Packaging
- 10g
- Price
- $256
- Updated
- 2025/07/31
- Product number
- B3745
- Product name
- 4-Bromopyrazole
- Purity
- >98.0%(GC)
- Packaging
- 5g
- Price
- $30
- Updated
- 2025/07/31
- Product number
- B3745
- Product name
- 4-Bromopyrazole
- Purity
- >98.0%(GC)
- Packaging
- 25g
- Price
- $86
- Updated
- 2025/07/31
- Product number
- B687110
- Product name
- 4-Bromo-1H-pyrazole
- Packaging
- 1g
- Price
- $110
- Updated
- 2021/12/16
4-Bromopyrazole Chemical Properties,Usage,Production
Chemical Properties
White to cream crystalline powder
Uses
4-Bromopyrazole can be used as starting material employed in a synthesis of 1,4′-bipyrazoles and in suzuki reaction.
Uses
As a mono substituted pyrozole, 4-Bromopyrazole can be used as Inhibitor of human liver alcohol dehydrogenase and used in mutagenicity study with the L-arabinose resistance test of Salmonella typhimurium.
General Description
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.
Synthesis
288-13-1
2075-45-8
Step 1: 1H-pyrazole (10 g, 147 mmol) was suspended in water (150 mL) at room temperature and N-bromosuccinimide (NBS, 26.1 g, 147 mmol) was added all at once. The reaction mixture immediately turned milky white, followed by continuous stirring at room temperature for 24 hours. Upon completion of the reaction, the reaction mixture was extracted with ethyl acetate (EtOAc, 2 x 100 mL). The combined organic phases were washed sequentially with aqueous sodium carbonate (Na2CO3) and saturated saline and dried over anhydrous sodium sulfate (Na2SO4). After concentration under reduced pressure, 21.5 g of light brown oily product (100% yield) was obtained, which solidified to a solid after standing. High performance liquid chromatography (HPLC) analysis showed a main peak retention time (RT) of 0.87 min.
References
[1] Saied M. Soliman, Ahmed M.A. Badr. “Synthesis, structure and Hirshfeld analysis of the potent antimicrobial [Ag(4-bromopyrazole)2ClO4] complex.” Polyhedron 171 (2019): Pages 323-329.
[2] Shaoling Wang , Hongkun Zhao, Cunbin Du . “Solubility, solution thermodynamics and preferential solvation for 4-bromopyrazole in mixed solvents of (methanol/ethanol+ water) from T = (283.15 to 318.15) K.” Journal of Chemical Thermodynamics 112 (2017): Pages 146-154.
4-Bromopyrazole Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from 4-Bromopyrazole manufacturers
- Product
- 4-Bromopyrazole 2075-45-8
- Price
- US $1.50/g
- Min. Order
- 1g
- Purity
- 99.0% Min
- Supply Ability
- 100 Tons
- Release date
- 2025-09-25
- Product
- 4-Bromopyrazole 2075-45-8
- Price
- US $1.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 20T
- Release date
- 2025-04-30
- Product
- 4-Bromopyrazole 2075-45-8
- Price
- US $1.00/g
- Min. Order
- 1g
- Purity
- 99%
- Supply Ability
- 100kg
- Release date
- 2024-06-25