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4-Bromo-1-methylpyrazole

Product Name
4-Bromo-1-methylpyrazole
CAS No.
15803-02-8
Chemical Name
4-Bromo-1-methylpyrazole
Synonyms
4-BROMO-1-METHYL-1H-PYRAZOLE;4-Bromo-1-methylpyrazole;4-Bromo-1-Methyl-1-Pyrazol;1--4- MethylbroMidepyrazole;cyclopent-1-enecarbaldehyde;1-Methyl-4-bromo-1H-pyrazole;4-Bromo-1-methylpyrazole >1- Methyl-4- broMinepyrazole;1-Mehtyl-4-Bromo-1H-Pyrazole;4-broMo-1-Methyl-1H-pyraz...
CBNumber
CB8702674
Molecular Formula
C4H5BrN2
Formula Weight
161
MOL File
15803-02-8.mol
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4-Bromo-1-methylpyrazole Property

Boiling point:
185-188°C
Density 
1.558
refractive index 
n20/D 1.531
Flash point:
93°C
storage temp. 
Sealed in dry,Room Temperature
form 
Liquid
pka
0.21±0.10(Predicted)
color 
Colorless to pale yellow
InChI
InChI=1S/C4H5BrN2/c1-7-3-4(5)2-6-7/h2-3H,1H3
InChIKey
IXJSDKIJPVSPKF-UHFFFAOYSA-N
SMILES
N1(C)C=C(Br)C=N1
CAS DataBase Reference
15803-02-8(CAS DataBase Reference)
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Safety

Hazard Codes 
Xi
Risk Statements 
37/38-41
Safety Statements 
26-39
RIDADR 
UN1760
WGK Germany 
3
HazardClass 
IRRITANT
HS Code 
29331990
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H315Causes skin irritation

H318Causes serious eye damage

H335May cause respiratory irritation

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
696455
Product name
4-Bromo-1-methyl-1H-pyrazole
Purity
97%
Packaging
5g
Price
$28.49
Updated
2025/07/31
Sigma-Aldrich
Product number
696455
Product name
4-Bromo-1-methyl-1H-pyrazole
Purity
97%
Packaging
25g
Price
$142
Updated
2025/07/31
TCI Chemical
Product number
B4060
Product name
4-Bromo-1-methylpyrazole
Purity
>98.0%(GC)
Packaging
5g
Price
$17
Updated
2025/07/31
TCI Chemical
Product number
B4060
Product name
4-Bromo-1-methylpyrazole
Purity
>98.0%(GC)
Packaging
25g
Price
$53
Updated
2025/07/31
TRC
Product number
B697563
Product name
4-Bromo-1-methyl-1H-pyrazole
Packaging
1g
Price
$55
Updated
2021/12/16
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4-Bromo-1-methylpyrazole Chemical Properties,Usage,Production

Uses

4-Bromo-1-methylpyrazole is a colourless or light yellow liquid at room temperature and pressure. It can be used as an intermediate in organic synthesis. It has good solubility in common organic solvents such as ethyl acetate, dichloromethane, dimethyl sulfoxide, and N, N-dimethylformamide but poor solubility in water.

Synthesis

The conventional synthesis method of 4-Bromo-1-methylpyrazole starts from methyl pyrazole and uses NBS to brominate the carbon atom at position 4 in pyrazole using water as a solvent to obtain the target product. This synthetic route is fast and simple, with high yield and convenient post-processing. It is worth noting that the boiling point of this compound is not high, and low-temperature concentration should be paid attention to during post-processing. In addition, there is also a synthetic method using liquid bromine and hydrobromic acid aqueous solution as bromination reagents.

4-Bromo-1-methylpyrazole Preparation Products And Raw materials

Raw materials

Preparation Products

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4-Bromo-1-methylpyrazole Suppliers

Americas 1 Belgium 1 Canada 1 CHINA 274 Europe 1 France 1 Germany 2 India 42 Japan 4 Switzerland 3 Ukraine 1 United Kingdom 10 United States 42 Global 383
Shandong Laifu Technology Development Co., Ltd.
Tel
13306419651
Email
1375993372@qq.com
Country
China
ProdList
52
Advantage
58
Shanghai Jin Yi Fine Chemical Co.,LTD
Tel
021-52801082 13918092929
Fax
021-52803959
Email
jinyi_service@jyfinechem.com
Country
China
ProdList
41
Advantage
57
Xi 'an billiton biological technology co., LTD
Tel
029-88764766 18191268030
Email
wang.yali@xatuochao.com
Country
China
ProdList
287
Advantage
58
Wuhan Roche Technology Development Co., Ltd.,
Tel
18986168071
Fax
027-88121016
Email
18986168071@163.com
Country
China
ProdList
93
Advantage
55
Shaanxi kelkai Pharmaceutical Technology Co., Ltd
Tel
029-2148545164 17392779578
Email
2148545164@qq.com
Country
China
ProdList
1144
Advantage
58
Shanghai Waytry Pharmas Co. Ltd.
Tel
021-50728690 18101878792
Fax
+86-21-50728690
Email
sales@waytrypharms.com
Country
China
ProdList
49
Advantage
57
J & K SCIENTIFIC LTD.
Tel
18210857532; 18210857532
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
4006356688 18621169109
Fax
86-21-61259102
Email
market03@meryer.com
Country
China
ProdList
40228
Advantage
62
future industrial shanghai co., ltd
Tel
400-0066400 13621662912
Fax
021-55660885
Email
sales@jonln.com
Country
China
ProdList
1995
Advantage
65
Alfa Aesar
Tel
400-6106006
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30123
Advantage
84
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View Lastest Price from 4-Bromo-1-methylpyrazole manufacturers

Shaanxi Didu New Materials Co. Ltd
Product
4-Bromo-1-methylpyrazole 15803-02-8
Price
US $1.50/g
Min. Order
1g
Purity
99.0% Min
Supply Ability
100 Tons
Release date
2025-09-25
Hebei Chuanghai Biotechnology Co., Ltd
Product
4-Bromo-1-methylpyrazole 15803-02-8
Price
US $0.00-0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
500000kg
Release date
2024-10-30
PUSHAN INDUSTRIAL (SHAANXI) CO.,LTD
Product
4-Bromo-1-methylpyrazole 15803-02-8
Price
US $0.00/kg
Min. Order
1kg
Purity
98%
Supply Ability
2 MTs
Release date
2024-08-06

15803-02-8, 4-Bromo-1-methylpyrazoleRelated Search:

1H-1,2,3-TRIAZOLE, 4-BROMO-1-METHYL- 3-(3-AMINOPHENYL)-4-BROMO-1-METHYLPYRAZOLE 4-BROMO-1-METHYLPYRAZOLE-5-CARBOXALDEHYDE,4-BROMO-1-METHYLPYRAZOLE-3-CARBOXALDEHYDE ETHYL 2-(4-BROMO-3,5-DIMETHYL-1H-PYRAZOL-1-YL)ACETATE 4-Bromo-1,3,5-trimethyl-1H-pyrazole 5-[(4-BROMO-3,5-DIMETHYL-1H-PYRAZOL-1-YL)METHYL]-1,3,4-OXADIAZOLE-2-THIOL 3-AMINO-4-BROMO-1-METHYLPYRAZOLE, 97+%,5-AMINO-4-BROMO-1-METHYLPYRAZOLE,3-AMINO-4-BROMO-2-METHYLPYRAZOLE 3-AMINO-4-BROMO-1-METHYLPYRAZOLE 5-AMINO-4-BROMO-3-METHYLPYRAZOLE HYDROBROMIDE,6-AMINO-3-BROMO-2-METHYLPYRAZOLE HYDROBROMIDE 4-BROMO-1-METHYLPYRAZOLE-5-CARBOXALDEHYDE 4-Bromo-3,5-dimethylpyrazole 4-BROMO-3-METHYLPYRAZOLE,4-Bromo-3-methylpyrazole,97%,4-BROMO-3-METHYLPYRAZOLE 97% 3-Bromo-1-methylpyrazole 4-Bromopyrazole 3,4,5-TRIBROMO-1-(4-NITROPHENYL)-1H-PYRAZOLE METHYL 3-[(4-BROMO-3,5-DIMETHYL-1H-PYRAZOL-1-YL)METHYL]BENZOATE 3-(4-BROMO-3,5-DIMETHYL-PYRAZOL-1-YLMETHYL)-BENZOIC ACID 3-(4-AMINOPHENYL)-4-BROMO-1-METHYLPYRAZOLE

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  • C4H5BrN
  • Organohalides
  • Pyrazole
  • CHIRAL CHEMICALS
  • Pyrazoles & Triazoles
  • Boronic Acid
  • Heterocyclic Compounds
  • Halides
  • Pyrazoles & Triazoles
  • Azoles
  • blocks
  • Bromides