Description

Ethyl Methyl Carbonate (CAS No. 623-53-0) is a high-purity carbonate ester solvent with the molecular formula C₄H₈O₃. This colorless, low-viscosity liquid is widely used as a non-aqueous electrolyte solvent in lithium-ion batteries due to its excellent electrochemical stability, high dielectric constant, and broad liquid temperature range. As a co-solvent, it enhances ionic conductivity while maintaining thermal and chemical stability in battery formulations. Our Ethyl Methyl Carbonate is synthesized under strict quality control, ensuring >99.5% purity with minimal water content (<50 ppm) and low acidity. Suitable for both research and industrial applications, it is supplied in sealed, nitrogen-purged containers to prevent moisture absorption and degradation. Ideal for advanced battery research, organic synthesis, and specialty solvent applications requiring a polar aprotic solvent with good solvating power.

Properties

• CAS Number: 623-53-0
• Complexity: 60
• IUPAC Name: ethyl methyl carbonate
• InChI: InChI=1S/C4H8O3/c1-3-7-4(5)6-2/h3H2,1-2H3
• InChI Key: JBTWLSYIZRCDFO-UHFFFAOYSA-N
• Exact Mass: 104.047344113
• Molecular Formula: C4H8O3
• Molecular Weight: 104.10
• SMILES: CCOC(=O)OC
• Topological: 35.5
• Monoisotopic Mass: 104.047344113
• Physical Description: Liquid
• Synonyms: Ethyl methyl carbonate, 623-53-0, Carbonic acid, ethyl methyl ester, Methyl Ethyl Carbonate, Ester solvent, Ethoxyacetic acid, methyl ester, methylethylcarbonate, UNII-OU358HAE25, OU358HAE25, C2H5OCOOCH3, Carbonic acid, ethyl-, methyl ester, ETHYL METHYL CARBONTE, DTXSID6074592, DTXCID9043304, 433-480-9, 613-014-2, jbtwlsyizrcdfo-uhfffaoysa-n, Carbonic Acid Ethyl Methyl Ester, Ethylmethylcarbonate, 99%, ethylmethylcarbonate, MFCD00191398, Ethyl methyl carbonate #, SCHEMBL42249, SCHEMBL42250, SCHEMBL63036, Ethyl methyl carbonate (EMC), Ethyl methyl carbonate, 98%, Ethyl methyl carbonate, 99%, SCHEMBL473763, SCHEMBL10426937, AKOS006228952, AS-77324, NS00011489, A11149, Ethyl methyl carbonate Kishida Chemical LBG-31353, Ethyl methyl carbonate 100 microg/mL in Acetonitrile, Q15632858, Ethyl methyl carbonate, 99.9%, acid <10 ppm, H2O <10ppm, EMC; Ethyl methyl carbonate; Ethylene methyl carbonate; Methyl ethyl carbonate; Carbonic acid, ethyl methyl ester

Application

Ethyl Methyl Carbonate serves as a key component in lithium-ion battery electrolytes, where it improves low-temperature performance and cycle life. It functions as a co-solvent in combination with ethylene carbonate and linear carbonates for high-voltage battery systems. The compound is also used as a solvent for organic synthesis and as a precursor for transesterification reactions. In material science, it finds application as a processing solvent for polymers and resins.

Safety and Hazards

GHS Hazard Statements

• H225 (92.1%): Highly Flammable liquid and vapor [Danger Flammable liquids]

Precautionary Statements

• P210, P233, P240, P241, P242, P243, P280, P303+P361+P353, P370+P378, P403+P235, and P501

Hazard Classes and Categories

• Flam. Liq. 2 (39.5%)
• Flam. Liq. 3 (59.7%)
• Skin Irrit. 2 (55.6%)
• Eye Irrit. 2 (56.5%)
• STOT SE 3 (34.7%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.