1. Used as solvent of nitrocellulose, cellulose ether, synthetic resin and natural resin in chemical production. The pharmaceutical industry is used in the manufacture of phenobarbital. The pesticide industry is used in the manufacture of pyrethrum. The instrument industry is used to manufacture sealing and fixing fluid. It is used as chemical reagent and electrolyte composition of lithium ion battery in analytical chemistry. It is also used for the preparation of special paint for vacuum pipe. In addition, diethyl carbonate is also an important reagent and reaction carrier for organic synthesis.

2. Diethyl carbonate is a common carbonylation reagent, which can be used to synthesize ketones, tertiary alcohols and heterocyclic compounds. In addition, diethyl carbonate can also be used as alkylation reagent of silicon carbonate and nucleophilic substrate.

Carboacylation of carbon anion diethyl carbonate is often used for the carboacylation of enol anion. The reaction conditions are mild and the yield is high. In the reaction process, sodium hydride, potassium hydride, LDA (or its mixture) and the like can be used as bases. At the same time, the selection of reaction substrates is relatively wide, and most of the molecules with electron absorbing groups [such as carbonyl, cyano, ester and enamine, etc.] α- Carboacylation can occur at all positions.

Synthesis of ketones and tertiary alcohols directly react organometallic substances with diethyl carbonate to obtain ketones or tertiary alcohols, such as the synthesis of corresponding ketones from imidazole.

Alkylation or allylation can be achieved by using poly triphenylphosphine as catalyst under appropriate conditions β- Carbonyl ester β- Alkylation or allylation of diketones, malonate, cyanide and nitro compounds.

Synthesis of heterocyclic compounds many substrates can react with carbonate diesters to form heterocyclic compounds. For example, 1,2-amino alcohol can react with diethyl carbonate to form oxazolidinones.

3. Used as solvent and organic synthesis.