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HomeProduct name listEthyl methyl carbonate

Ethyl methyl carbonate

Synonym(s):Carbonic acid ethyl methyl ester;EMC;Methyl ethyl carbonate

  • CAS NO.:623-53-0
  • Empirical Formula: C4H8O3
  • Molecular Weight: 104.1
  • MDL number: MFCD00191398
  • EINECS: 433-480-9
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-10-29 09:21:56
Ethyl methyl carbonate  Structural

What is Ethyl methyl carbonate ?

Description

Ethyl methyl carbonate (EMC) is an asymmetric aliphatic organic carbonate. It is a colorless transparent liquid widely used as an excellent solvent for lithium-ion battery electrolytes. EMC increases the solubility of lithium ions improving the capacity density and power of batteries. This compound has excellent thermal conductivity and low electrical resistance, extending the working temperature range of electrolytes, improving lithium batteries' safety, and prolonging their service life. EMC is usually obtained by metal oxide-catalyzed transesterification over dimethyl carbonate and diethyl carbonate. High percentage yields are obtained if the reaction is carried out in liquid or vapor phase[1].

The Uses of Ethyl methyl carbonate

Non-aqueous solvent for Li-ion batteries

The Uses of Ethyl methyl carbonate

Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.

The Uses of Ethyl methyl carbonate

EMC is majorly utilized as a co-solvent in the nonaqueous electrolyte. It enhances the energy density and discharge capacity of lithium-ion batteries.

General Description

This product has been enhanced for energy efficiency.

Advantages

Ethyl methyl carbonate enables the largest reversible capacity, best cycle stability, highest cycle Coulombic efficiency, lowest onset potential, smallest polarization, lowest self-discharge rate, and best rate performance from graphite compared to dimethyl carbonate and diethyl carbonate. Ethyl methyl carbonate forms a thinner layer of cathode electrolyte interface on the graphite surface with fewer Li–F and ROCO2Li species than with dimethyl carbonate and diethyl carbonate[2].

References

[1] Guido N. Rimondino , Fabio E. Malanca, Jesús A. Vila . “Atmospheric oxidation of ethyl methyl carbonate: Kinetics and reaction mechanism.” Journal of Photochemistry and Photobiology A-chemistry 444 (2023): Article 114994.
[2] Yao Wang. “Unlocking the True Capability of Graphite-Based Dual-Ion Batteries with Ethyl Methyl Carbonate Electrolyte.” ACS Applied Energy Materials 2 10 (2019): 7512–7517.

Properties of Ethyl methyl carbonate

Melting point: -14.5℃
Boiling point: 107 °C
Density  1.006 g/mL at 25 °C
vapor pressure  43hPa at 25℃
refractive index  n20/D 1.378
Flash point: 23°C
storage temp.  2-8°C
form  clear liquid
color  Colorless to Almost colorless
Water Solubility  46.8-47.1g/L at 20℃
InChI InChI=1S/C4H8O3/c1-3-7-4(5)6-2/h3H2,1-2H3
CAS DataBase Reference 623-53-0(CAS DataBase Reference)
NIST Chemistry Reference C2H5OCOOCH3(623-53-0)
EPA Substance Registry System Carbonic acid, ethyl methyl ester (623-53-0)

Safety information for Ethyl methyl carbonate

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
GHS Hazard Statements H225:Flammable liquids
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

Computed Descriptors for Ethyl methyl carbonate

InChIKey JBTWLSYIZRCDFO-UHFFFAOYSA-N
SMILES C(OC)(=O)OCC

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