Description

BMI-FSI (1-Butyl-3-methylimidazolium Bis(fluorosulfonyl)imide) is a high-performance ionic liquid belonging to the imidazolium family, specifically the salt of 1-butyl-3-methylimidazolium and bis(fluorosulfonyl)imide. This compound is valued for its exceptional electrochemical stability, low viscosity, and high ionic conductivity, making it a superior electrolyte component. It is primarily needed by researchers and manufacturers in the energy storage, advanced materials, and specialty chemical synthesis sectors.

Application

• Electrolyte for Lithium-ion Batteries: Used as a key component in high-voltage and high-safety electrolytes to enhance cycle life and thermal stability.
• Supercapacitor Electrolyte: Employed in double-layer capacitors and pseudocapacitors for its wide electrochemical window and high conductivity.
• Electrochemical Deposition: Serves as a solvent and electrolyte medium for the electroplating of reactive metals like aluminum and magnesium.
• Chemical Synthesis & Catalysis: Acts as a green solvent or catalyst in organic synthesis, including Diels-Alder and Friedel-Crafts reactions.
• Gas Separation & Capture: Utilized in supported ionic liquid membranes (SILMs) for selective separation of CO2 and other gases.
• Lubricant & Additive: Functions as a high-performance lubricant or anti-wear additive for demanding mechanical applications.
• Analytical Chemistry: Used as a stationary phase modifier in chromatography or as a matrix in mass spectrometry.

Basic Information

Product Name	BMI-FSI
CAS No.	1235234-58-8
Molecular Formula	C8H15F2N3O4S2
Molecular Weight	319.35 g/mol
Synonyms	1-Butyl-3-methylimidazolium Bis(fluorosulfonyl)imide; BMIM FSI; BMIM-BF4 (common misnomer, clarify); [BMIM][FSI]; 1-Butyl-3-methylimidazolium Bis(fluorosulfonyl)amide; N-Butyl-N'-methylimidazolium Bis(fluorosulfonyl)imide; 1H-Imidazolium, 3-butyl-1-methyl-, salt with imidodisulfuryl fluoride (1:1); Ionic Liquid BMI-FSI
EINECS	Contact for details

Quality Control

Our BMI-FSI is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the exacting requirements for advanced electrochemical applications. Certificates of Analysis (COA) detailing purity, impurity profiles, and key physical properties are available upon request to support your R&D and quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled under an inert atmosphere such as argon or nitrogen to prevent degradation. Keep away from strong acids, strong bases, and strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0%
Water Content (KF)	≤ 100 ppm
Halide Content (Cl⁻, Br⁻)	≤ 50 ppm
Heavy Metals (as Pb)	≤ 10 ppm
Density (at 20°C)	~1.38 g/cm³
Viscosity (at 20°C)	~50 mPa·s

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.