Ethyl Methyl Carbonate (EMC), known scientifically by its CAS number 623-53-0, is a compound whose significance in modern industries, particularly in energy storage and chemical synthesis, stems directly from its distinct chemical properties. As a manufacturer and supplier committed to providing high-quality chemical raw materials, we believe understanding these properties is key for our B2B clients, including R&D scientists and procurement managers. This article explores the fundamental chemistry that makes EMC a valuable asset.

At its core, Ethyl Methyl Carbonate is an asymmetric organic carbonate ester. Its molecular formula, C4H8O3, reveals a structure where a carbonate group (C=O) bridges an ethyl group (-CH2CH3) and a methyl group (-CH3). This asymmetry is crucial. Unlike its symmetrical counterparts, dimethyl carbonate (DMC) and diethyl carbonate (DEC), EMC exhibits a unique blend of characteristics. This structural peculiarity allows it to dissolve a broader range of solutes and influences its electrochemical behavior, making it an excellent co-solvent for lithium-ion battery electrolytes. When procurement teams look to buy Ethyl Methyl Carbonate, this dual-natured aspect is a primary draw.

Physically, EMC is a colorless, transparent liquid with a relatively low viscosity and a moderate boiling point of approximately 107°C. Its flash point, around 23-27°C, classifies it as a flammable liquid, necessitating appropriate handling and storage precautions. Its density is typically around 1.0 g/cm³. The solubility of EMC in water is moderate, but it is miscible with most common organic solvents. These physical attributes contribute to its ease of use in various industrial settings. For example, its liquid state at room temperature simplifies handling compared to solid chemicals.

Electrically, EMC possesses a high dielectric constant and low electrical resistance. These properties are vital for its role in electrolytes, as they facilitate the efficient dissociation of lithium salts and the transport of lithium ions between the electrodes. This contributes directly to higher ionic conductivity, enhanced battery efficiency, and improved rate performance. Manufacturers who supply EMC for battery applications must therefore ensure extremely low levels of contaminants that could impede these electrical properties.

Chemically, the ester linkages within EMC are susceptible to hydrolysis under strongly acidic or basic conditions, but it exhibits good stability within the neutral pH range and in non-aqueous environments, which is typical for battery electrolytes. Its asymmetric nature means it can sometimes offer advantages in terms of solubility and viscosity compared to symmetric carbonates. When you purchase Ethyl Methyl Carbonate from a reputable supplier like us, you are acquiring a product engineered for optimal performance.

In summary, the chemistry of Ethyl Methyl Carbonate is characterized by its asymmetric structure, leading to a unique combination of solvent properties, electrochemical performance enhancements, and physical attributes. These characteristics make it an indispensable component in advanced lithium-ion batteries and a versatile solvent for organic synthesis. We, as a dedicated manufacturer in China, are committed to providing EMC with the precise specifications required by demanding industries. Contact us to discuss your needs and learn more about buying this exceptional chemical.