Dimethyl carbonate
DMC, Carbonic acid dimethyl ester, Methyl carbonate
- CAS
- 616-38-6
- EC
- 210-478-4
- Sectors
- Electronics & Solar PV, Coatings, Adhesives, Sealants & Elastomers, Pharma & Healthcare
Dimethyl carbonate (CAS 616-38-6) is an oxygenated carbonate ester supplied as a colorless liquid that serves as a VOC-exempt solvent in many jurisdictions and as a methylating and carbonylating reagent in battery electrolytes, coatings, adhesives and pharmaceutical synthesis. It serves as a sustainable alternative to ketones and esters in industrial formulations, offering high solvency with a reduced environmental footprint.
Functioning as a potent methylating agent and carbonylating agent, this chemical effectively replaces hazardous substances like phosgene and dimethyl sulfate in organic synthesis. Its unique molecular structure allows for safe handling while maintaining reactivity in the production of pharmaceutical intermediates and agrochemicals.
In the energy sector, it is a critical component of electrolyte solutions used in Lithium-Ion batteries, ensuring high electrochemical stability and conductivity. It is essential for modern energy storage systems and high-performance coatings and adhesives requiring rapid evaporation rates.
Typical Properties
| Molecular formula | C3H6O3 |
|---|---|
| Molecular weight | 90.08 g/mol |
| Appearance | colourless liquid |
| Form | Liquid |
| Color | <50(APHA) |
| Odor | Pleasant |
| Melting point | 0.5 °C |
| Boiling point | 90-91 °C |
| Density | 1.0636 g/cm³ @ Temp: 25 °C |
| Water solubility | 139 g/L |
| Flash point | 65 °F |
| GHS signal word | Danger · Flammable, Irritant / harmful, Health hazard |
| HS code | 29209090 |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Dimethyl carbonate
Applications
- Battery Electrolytes: Acts as a primary co-solvent in Lithium-Ion batteries to enhance the conductivity and stability of the electrolyte system.
- Paints & Coatings: Used as a low-toxicity solvent in acrylics, urethane, and epoxy resins to adjust viscosity without contributing to VOC load.
- Chemical Synthesis: Serves as a safe methylating and carbonylating reagent for producing polycarbonates, pharmaceuticals, and crop protection chemicals.
- Industrial Cleaning: Applied as a precision cleaning solvent for degreasing machinery and preparing surfaces due to its favorable evaporation profile.
Safety & Risks
Dimethyl Carbonate is classified as a Highly Flammable Liquid and Vapor and must be stored away from heat, sparks, and open flames. While less toxic than many traditional solvents, it can cause eye irritation and requires proper ventilation during use. Operators should utilize flame-retardant clothing, chemical-resistant gloves, and safety goggles to prevent exposure. Grounding and bonding of containers are essential to prevent static discharge during transfer.
Packaging
• 200 L Steel Drums
• 1000 L IBC Totes
• Bulk / ISO Tank