1-Butyl-3-methylimidazolium bromide
[CAS# 85100-77-2]

Identification

• Classification: Chemical reagent >> Organic reagent >> Ionic liquid
• Name: 1-Butyl-3-methylimidazolium bromide
• Molecular Formula: C₈H₁₅N₂^.Br
• Molecular Weight: 219.12
• CAS Registry Number: 85100-77-2
• EC Number: 617-674-2
• SMILES: CCCCN1C=C[N+](=C1)C.[Br-]

Properties

• Melting point: 65-75 ºC

Safety Data

• Hazard Symbols: GHS07 Warning
• Hazard Statements: H315-H319
• Precautionary Statements: P264-P264+P265-P280-P302+P352-P305+P351+P338-P321-P332+P317-P337+P317-P362+P364

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Eye irritation	Eye Irrit.	2	H319
Skin irritation	Skin Irrit.	2	H315

Discovory and Applicatios

1-Butyl-3-methylimidazolium bromide (BMIM Br) is an ionic liquid that has attracted much attention due to its unique properties and wide range of applications in various fields. As part of the imidazolium-based ionic liquid family, BMIM Br is known for its stability, non-volatility, and ability to dissolve a wide range of substances.

The discovery of BMIM Br stems from the extensive exploration of ionic liquids, which began to attract widespread scientific attention in the late 20th century. Researchers sought alternatives to traditional solvents, which often pose environmental and safety hazards. The synthesis of BMIM Br involves the alkylation of 1-methylimidazolium with butyl bromide, resulting in a stable ionic liquid that has beneficial properties for a variety of applications.

1-Butyl-3-methylimidazolium bromide has the molecular formula C8H15BrN2 and has several notable properties: BMIM Br remains liquid at room temperature, which improves its usability in different chemical processes; it can withstand high temperatures without decomposing, making it suitable for applications that require heat resistance; low viscosity allows BMIM Br to effectively act as a solvent, promoting reactions and effectively dissolving substances; and the non-volatility of BMIM Br reduces the risk of evaporation and loss, ensuring consistent performance in applications.

BMIM Br is widely used as a green solvent in chemical synthesis and catalysis. Its ability to dissolve a wide range of organic and inorganic compounds makes it ideal for reactions where traditional solvents may be unsuitable or harmful to the environment. BMIM Br can generally increase reaction rates and selectivity, promoting more efficient and sustainable chemical processes.

BMIM Br has important applications in the field of energy storage, especially as an electrolyte in batteries. Its high ionic conductivity and thermal stability can improve the performance, stability and life of batteries, helping to develop advanced battery technologies such as lithium-ion batteries.

In separation processes, BMIM Br can effectively extract metals and purify natural products. Its selective solvation ability allows for the efficient separation and recovery of valuable compounds from complex mixtures, making it a valuable tool in both industrial and laboratory settings.

BMIM Br is used as a medium in polymerization reactions. Its ability to dissolve monomers and catalysts, combined with its stability, makes it an ideal solvent for producing high-quality polymers with desired properties.

The unique properties of BMIM Br allow it to be used in environmental applications, such as the removal of pollutants from water and soil. Its nonvolatility and ability to dissolve pollutants aid in effective environmental cleanup efforts and sustainable development initiatives.

BMIM Br can also be used as a catalyst or co-catalyst in a variety of chemical reactions. Its ionic nature can facilitate certain reactions, increasing yields and reaction rates. This application is particularly valuable in organic synthesis and industrial chemistry.

BMIM Br supports the principles of green chemistry by providing a safer alternative to traditional solvents. Its low volatility and potential for recycling and reuse reduce environmental impact and improve the safety of chemical processes. The nonflammability and thermal stability of BMIM Br enhance safety in industrial and laboratory settings. These properties reduce the risk of accidents and support safer handling practices. The wide range of applications of BMIM Br highlights its versatility. Their properties make them valuable tools for advancing a wide range of scientific and industrial fields, from energy storage to environmental remediation.

References

2024. A new Ionic Liquid-Modified Silver/Multi-Walled Carbon Nanotubes Biosensor for Detection of Glucose in Honey Samples. Food and Bioprocess Technology, 17(10).
DOI: 10.1007/s11947-024-03645-0

2023. Dissolution Efficiency of Wood Pulp in Ionic Liquids Based on 1-Butyl-3-Methylimidazolium with Different Anions. Russian Journal of Physical Chemistry B, 17(4).
DOI: 10.1134/s1990793123040115

2003. Crystal polymorphism in 1-butyl-3-methylimidazolium halides: supporting ionic liquid formation by inhibition of crystallization. Chemical communications (Cambridge, England).
DOI: 10.1039/b304543a