Description

Diethyl(Methyl)Propylammonium Bis(Fluorosulfonyl)Imide is a high-purity ionic liquid salt, also known as DEMP-FSI, with the CAS number 1235234-32-8. This compound is a critical component in advanced electrochemical systems, valued for its exceptional ionic conductivity and wide electrochemical stability window. It is primarily sought by researchers and manufacturers in the energy storage sector for developing next-generation lithium-ion and solid-state batteries.

Application

• Electrolyte Additive/Salt for Lithium-Ion Batteries: Used to enhance ionic conductivity, improve thermal stability, and extend cycle life in high-voltage cathode systems.
• Solid-State Electrolyte Formulation: A key component in polymer or ceramic composite electrolytes for safer, solid-state battery technology.
• Supercapacitor Electrolyte: Employed in electric double-layer capacitors (EDLCs) and pseudo-capacitors for high-power energy storage applications.
• Electrochemical Research & Development: Serves as a model ionic liquid for studying ion transport mechanisms and developing new electrochemical devices.
• Specialty Chemical Synthesis: Acts as a precursor or catalyst in organic synthesis and other specialty chemical manufacturing processes.

Basic Information

Product Name	Diethyl(Methyl)Propylammonium Bis(Fluorosulfonyl)Imide
CAS No.	1235234-32-8
Molecular Formula	C9H21F2N2O4S2
Molecular Weight	323.40 g/mol
Synonyms	DEMP-FSI; Diethylmethylpropylammonium FSI; N,N-Diethyl-N-methylpropan-1-aminium bis(fluorosulfonyl)imide; 1-Propanaminium, N,N-diethyl-N-methyl-, bis(fluorosulfonyl)amide; Ionic Liquid [DEMP][FSI]; DEMP FSI salt; FSI-based ionic liquid; Battery-grade ionic liquid salt
EINECS	Contact for details

Quality Control

Our production of Diethyl(Methyl)Propylammonium Bis(Fluorosulfonyl)Imide adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity, which is critical for electrochemical performance. Each lot is analyzed for key parameters including ionic purity, moisture content, and metallic impurities. A comprehensive Certificate of Analysis (COA) detailing purity (typically ≥99.0% by HPLC/NMR), water content, and anion/cation confirmation is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive) and should be stored under a dry, inert atmosphere (e.g., argon or nitrogen) in a cool, dry place. Recommended storage temperature is 2-8°C for long-term stability. The container should be kept tightly sealed when not in use to prevent absorption of atmospheric moisture and carbon dioxide.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Purity (HPLC)	≥ 99.0 %
Water Content (KF)	≤ 100 ppm
Halide Content (Cl⁻, Br⁻)	≤ 10 ppm
Heavy Metals (as Pb)	≤ 5 ppm
Anion Content (FSI⁻)	Conforms
Cation Content (DEMP⁺)	Conforms

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