Ethyl-methyl-carbonate

🧪 Basic Properties

• Chemical Formula: C₄H₈O₃

• Molecular Weight: Approx. 104.10

• Appearance: A colorless, transparent liquid with a faint aromatic odor at room temperature.

Key Parameters:

• Melting Point: Ranges from –55°C to –14°C (varies depending on the measurement method)

• Boiling Point: Approx. 107°C

• Density: Approx. 1.01 g/mL

• Solubility: Insoluble in water, but miscible with most organic solvents such as alcohols, ketones, and esters.

Safety Information:

• Classified as a flammable liquid (UN 3272, Hazard Class 3) with a closed-cup flash point of approximately 23°C.

• Its vapor is heavier than air and may travel to distant ignition sources, causing flashback.

✨ Key Features and Applications

• Lithium-Ion Battery Electrolyte Solvent (Primary Use):
  This is the most important downstream application of EMC. As a solvent in lithium battery electrolytes, it provides good ionic conductivity and electrochemical stability. It is a key product that has grown in tandem with the lithium battery industry.

• Multifunctional Solvent and Intermediate:
  Due to its possession of both methyl and ethyl groups, EMC shares some characteristics of both dimethyl carbonate (DMC) and diethyl carbonate (DEC). It is also used as a solvent in specialty fragrances, pharmaceutical intermediates, and organic synthesis.

⚠️ Storage and Handling

• Storage:
  Should be stored in a cool, well-ventilated, and dry warehouse, away from ignition sources and heat. Recommended storage temperature should not exceed 30°C. Must be stored separately from oxidizers, reducing agents, acids, and other incompatible substances. Explosion-proof lighting and ventilation equipment should be used.

• Health Hazards:
  Inhalation may cause dizziness, headache, and similar symptoms. It is irritating to the eyes, and prolonged skin contact may also cause irritation. Proper protective measures should be taken during handling (e.g., wearing protective goggles and anti-static work clothing).