ChemicalBook > CAS DataBase List > 4-Bromo-1-ethyl-1H-pyrazole

4-Bromo-1-ethyl-1H-pyrazole

Product Name: 4-Bromo-1-ethyl-1H-pyrazole
CAS No.: 71229-85-1
Chemical Name: 4-Bromo-1-ethyl-1H-pyrazole
Synonyms: Albb-004431;1-ethyl-4-bromoimazole;-Bromo-1-ethylpyrazole;4-Bromo-1-ethylpyrazole ;1H-Pyrazole,4-bromo-1-ethyl-;4-Bromo-1-ethyl-1H-pyrazole 95+%;4-bromo-1-ethyl-1H-pyrazole(SALTDATA: FREE)
CBNumber: CB31457460
Molecular Formula: C5H7BrN2
Formula Weight: 175.03
MOL File: 71229-85-1.mol

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4-Bromo-1-ethyl-1H-pyrazole Property

Boiling point:: 108°C/20mmHg(lit.)
Density: 1.57±0.1 g/cm3(Predicted)
refractive index: 1.5170 to 1.5210
storage temp.: 2-8°C
form: clear liquid
pka: 0.23±0.10(Predicted)
color: Light orange to Yellow to Green
InChI: InChI=1S/C5H7BrN2/c1-2-8-4-5(6)3-7-8/h3-4H,2H2,1H3
InChIKey: IPMSARLBJARXSC-UHFFFAOYSA-N
SMILES: N1(CC)C=C(Br)C=N1

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Safety

Hazard Codes: Xi
HS Code: 2933199090

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H227Combustible liquid

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

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.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

P370+P378In case of fire: Use … for extinction.

P403+P235Store in a well-ventilated place. Keep cool.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

TCI Chemical

Product number: B5100
Product name: 4-Bromo-1-ethylpyrazole
Purity: >98.0%(GC)
Packaging: 1g
Price: $68
Updated: 2025/07/31

TCI Chemical

Product number: B5100
Product name: 4-Bromo-1-ethylpyrazole
Purity: >98.0%(GC)
Packaging: 5g
Price: $200
Updated: 2025/07/31

TRC

Product number: B696125
Product name: 4-Bromo-1-ethyl-1H-pyrazole
Packaging: 1g
Price: $75
Updated: 2021/12/16

TRC

Product number: B696125
Product name: 4-Bromo-1-ethyl-1H-pyrazole
Packaging: 100mg
Price: $45
Updated: 2021/12/16

TRC

Product number: B696125
Product name: 4-Bromo-1-ethyl-1H-pyrazole
Packaging: 250mg
Price: $55
Updated: 2021/12/16

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4-Bromo-1-ethyl-1H-pyrazole Chemical Properties,Usage,Production

Synthesis

2075-45-8

75-03-6

71229-85-1

a) Synthesis of 4-bromo-1-ethyl-1H-pyrazole: To a DMF solution of 4-bromo-1H-pyrazole (5 g, 34 mmol) was added potassium carbonate (K2CO3, 11.75 g, 85.03 mmol, 2.5 equiv) and ethyl iodide (8 g, 51 mmol, 1.5 equiv). The reaction mixture was stirred at room temperature for 12 hours. Upon completion of the reaction, a quench and extraction operation was performed as in Intermediate Example 5(c). The solvent was removed by distillation and the crude product obtained was purified by column chromatography (60-120 mesh silica gel, 40% ethyl acetate in hexane solution as eluent), resulting in the target product 1-ethyl-4-bromopyrazole in 84% (5 g) yield. The structure of the product was confirmed by 1H NMR (300 MHz, DMSO-d6) and LC-MS (ESI): 1H NMR (300 MHz, DMSO-d6) δ 8.02 (s, 1H), 7.55 (s, 1H), 4.15 (q, 2H), 1.37 (t, 3H); LC-MS (ESI): calculated mass: 175.03; Measured mass: 177.0 [M + H]+ (retention time: 0.56 min).

References

[1] Patent: WO2013/53983, 2013, A1. Location in patent: Page/Page column 36
[2] Patent: US2015/11548, 2015, A1. Location in patent: Paragraph 0150
[3] Patent: WO2015/92713, 2015, A1. Location in patent: Page/Page column 403
[4] Patent: WO2015/77503, 2015, A1. Location in patent: Paragraph 00341
[5] Patent: US9051320, 2015, B1. Location in patent: Paragraph 0258

4-Bromo-1-ethyl-1H-pyrazole Preparation Products And Raw materials

Raw materials

Preparation Products

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View Lastest Price from 4-Bromo-1-ethyl-1H-pyrazole manufacturers

Hubei Lidu New Material Technology Co., Ltd

Product: 4-Bromo-1-ethyl-1H-pyrazole 71229-85-1
Price: US $0.00-0.00/G
Min. Order: 1G
Purity: 97%
Supply Ability: 20TONS
Release date: 2025-11-04

Career Henan Chemical Co

Product: 4-Bromo-1-ethyl-1H-pyrazole 71229-85-1
Price: US $1.00/kg
Min. Order: 1kg
Purity: 98%
Supply Ability: 100KG
Release date: 2018-12-22

71229-85-1, 4-Bromo-1-ethyl-1H-pyrazoleRelated Search:

5-[(4-BROMO-3,5-DIMETHYL-1H-PYRAZOL-1-YL)METHYL]-1,3,4-OXADIAZOLE-2-THIOL ETHYL 2-(4-BROMO-3,5-DIMETHYL-1H-PYRAZOL-1-YL)ACETATE 1-ACETYL-4-BROMO-3(5)-TRIFLUOROMETHYL-5(3)-(METHYL)PYRAZOLE 2-(4-BROMO-3,5-DIMETHYL-1H-PYRAZOL-1-YL)ETHANETHIOAMIDE 4-BROMO-3,5-DIMETHYL-1-(5-TETRAZOLYLMETHYL)-1H-PYRAZOLE 1-ACETYL-4-BROMO-5(3)-METHYL-3(5)-[PERFLUORO(1-PROPOXYETHYL)]PYRAZOLE 3-(4-BROMO-3,5-DIMETHYL-PYRAZOL-1-YLMETHYL)-BENZOIC ACID METHYL 3-[(4-BROMO-3,5-DIMETHYL-1H-PYRAZOL-1-YL)METHYL]BENZOATE 1-ACETYL-4-BROMO-3(5)-(HEPTAFLUOROPROPYL)-5(3)-PHENYLPYRAZOLE 1-ACETYL-4-BROMO-3(5)-(HEPTAFLUOROPROPYL)-5(3)-METHYLPYRAZOLE 2-(4-BROMO-3,5-DIMETHYL-1H-PYRAZOL-1-YL)ACETONITRILE 4-BROMO-1-(4-METHYLBENZYL)-1H-PYRAZOLE-5-CARBOXALDEHYDE 4-BROMO-1-(4-CHLOROBENZYL)-1H-PYRAZOLE-5-CARBALDEHYDE N-(4-CHLOROPHENYL)-N'-[2-(3,4,5-TRIBROMO-1H-PYRAZOL-1-YL)ETHYL]THIOUREA N1,N1-DIMETHYL-N'1-[2-(3,4,5-TRIBROMO-1H-PYRAZOL-1-YL)ETHYL]ETHANIMIDAMIDE N1-[2-(3,4,5-TRIBROMO-1H-PYRAZOL-1-YL)ETHYL]-4-CHLOROBENZENE-1-SULFONAMIDE N1-[2-(3,4,5-TRIBROMO-1H-PYRAZOL-1-YL)ETHYL]BENZAMIDE 5-(4-BROMO-3,5-DIMETHYLPYRAZOL-1-YLMETHYL)-4-METHYL-1,2,4-TRIAZOLE-3-THIOL

Albb-004431

4-bromo-1-ethyl-1H-pyrazole(SALTDATA: FREE)

4-Bromo-1-ethylpyrazole

-Bromo-1-ethylpyrazole

4-Bromo-1-ethyl-1H-pyrazole 95+%

1H-Pyrazole,4-bromo-1-ethyl-

1-ethyl-4-bromoimazole

71229-85-1

Pyrazoles & Triazoles

blocks

Bromides

Halides

Pyrazoles & Triazoles