1-Allyl-3-methylimidazolium tetrafluoroborate

Updated: 2026-07-20

Overview

1-Allyl-3-methylimidazolium tetrafluoroborate ([AMIM][BF4]) is a room-temperature ionic liquid (RTIL) belonging to the imidazolium salt family. It combines the 1-allyl-3-methylimidazolium cation with the tetrafluoroborate anion, creating a versatile solvent with unique electrochemical and catalytic properties. As a green chemistry alternative, it replaces volatile organic compounds in many applications. Its stability across a wide temperature range and negligible vapor pressure make it particularly valuable for specialized industrial processes where conventional solvents are unsuitable.

Physical and Chemical Properties

This ionic liquid exhibits excellent thermal stability, typically remaining stable up to 300-350°C before decomposition begins. Its low melting point (<-20°C) ensures liquid state at room temperature, while the high polarity enables dissolution of various organic and inorganic compounds. The tetrafluoroborate anion contributes to the compound's relatively low viscosity compared to other ionic liquids, enhancing mass transport properties. The allyl group on the imidazolium ring offers potential for further chemical modification, making it a versatile building block for functionalized ionic liquids.

Main Applications

In electrochemistry, [AMIM][BF4] serves as an electrolyte in batteries, supercapacitors, and electrodeposition processes due to its wide electrochemical window and good ionic conductivity. The chemical industry utilizes it as a solvent for catalytic reactions, particularly in transition metal catalysis and biocatalysis. Other applications include its use as a medium for nanomaterials synthesis, gas separation membranes, and as a stationary phase in chromatography. The green chemistry sector values it for replacing volatile organic solvents in extraction processes and chemical synthesis, reducing environmental impact.

Safety and Storage

While ionic liquids are generally considered safer than traditional solvents, [AMIM][BF4] requires careful handling. It can cause skin and eye irritation, and prolonged exposure should be avoided. Always use appropriate personal protective equipment including gloves and safety glasses. Storage should be in tightly sealed containers under inert atmosphere (argon or nitrogen) to prevent moisture absorption. Although non-flammable, decomposition at high temperatures can release toxic fumes, necessitating proper ventilation in working areas.

B2B Procurement Guide

When sourcing [AMIM][BF4], prioritize suppliers who provide comprehensive analytical certificates including purity assessment (typically 98-99.9%), water content, and halide impurities. Industrial-scale buyers should request batch consistency guarantees and material safety data sheets. For specialized applications, consider custom synthesis options with modified purity grades or isotopic labeling. Bulk procurement (kilogram scale) typically offers significant cost reductions compared to laboratory-scale quantities. Verify supplier compliance with relevant chemical regulations (REACH, TSCA) for your target markets.