Diethyl carbonate
Carbonic Ether, Ethyl Carbonate
- CAS
- 105-58-8
- EC
- 203-311-1
- Sectors
- Electronics & Solar PV, Pharma & Healthcare, Coatings, Adhesives, Sealants & Elastomers
Diethyl carbonate (CAS 105-58-8) is an organic carbonate ester, an ethyl ester of carbonic acid, supplied as a clear, colorless liquid with a mild odor; it is used as an electrolyte co-solvent in lithium-ion batteries, an ethylating and carbonylating agent in synthesis, and a solvent for nitrocellulose and synthetic resins. It provides exceptional electrochemical stability and low viscosity, making it critical for enhancing the energy density and cycle life of modern energy storage systems.
As a versatile ethylating agent, this chemical serves a vital role in organic synthesis for the production of pharmaceutical intermediates and agrochemicals. Its unique reactivity allows it to act as a carbonylating agent, offering a safer alternative to toxic phosgene in specific industrial reactions.
Beyond synthesis, DEC functions as an effective solvent for nitrocellulose, natural resins, and synthetic polymers in advanced coating formulations. It is available in high-purity grades to meet the rigorous standards of the electronics and chemical manufacturing sectors.
Typical Properties
| Molecular formula | C5H10O3 |
|---|---|
| Molecular weight | 118.13 g/mol |
| Appearance | colourless liquid with a mild odour |
| Form | Liquid |
| Color | Clear |
| Odor | Pleasant, etheral; mild and nonresidual. |
| Melting point | -43 °C |
| Boiling point | 126 °C |
| Density | 0.9752 g/cm³ @ Temp: 20 °C |
| Water solubility | Negligible |
| Flash point | 88 °F |
| pH | 6.3 (1g/l, H2O) |
| GHS signal word | Warning · Flammable, Irritant / harmful |
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.
Diethyl carbonate
Applications
- Battery Manufacturing: Used as a co-solvent in non-aqueous electrolytes for Lithium-Ion batteries to improve conductivity and temperature performance.
- Pharmaceutical Synthesis: Acts as a specialized intermediate and ethylating agent in the production of heterocyclic compounds and active pharmaceutical ingredients (APIs).
- Coatings & Resins: Functions as a solvent for nitrocellulose, cellulose ethers, and synthetic resins, ensuring uniform film formation.
- Chemical Processing: Used as a reagent for carbonylation reactions, replacing hazardous chlorinated compounds in industrial organic chemistry.
Safety & Risks
Diethyl Carbonate is classified as a Flammable Liquid and vapor (Category 3). It may cause skin and serious eye irritation upon contact. Personnel must handle with care using flame-retardant clothing, chemical-resistant protective gloves, and safety goggles. Ensure operations are conducted in a well-ventilated area away from ignition sources to prevent combustion.
Packaging
- 200 L Drums
- IBC Totes
- Bulk / ISO Tank