Ethyl methyl carbonate

Ethyl methyl carbonate (CAS 623-53-0), commonly abbreviated as EMC, is a linear organic carbonate ester used as a high-purity solvent and electrolyte component in battery and pharmaceutical manufacturing.

Where is Ethyl methyl carbonate used?

• Lithium-ion batteries: primary electrolyte solvent, blended with other carbonates to optimize ionic conductivity and cycle performance
• Pharmaceutical synthesis: reaction solvent and intermediate for active ingredient processing
• Industrial and specialty cleaning: carrier solvent that dissolves resins, coatings, and adhesive residues without aggressive substrate attack
• Flavor and fragrance compounding: solvent carrier for sensitive aroma compounds requiring controlled release
• Its low viscosity and broad solvency profile make it a carrier in formulations requiring controlled evaporation and chemical compatibility.

Good to know: Battery-grade and high-purity electronic grades are the most commercially prominent specifications, featuring defined water content and metal ion limits critical for electrolyte applications. Pharmaceutical-grade material is available from select suppliers where process purity documentation is required.

Commercial specifications

• Battery-grade and high-purity electronic grades: defined water content and metal ion limits
• Pharmaceutical grade: process purity documentation required
• Clear liquid in drum, IBC, and bulk quantities