Use and properties of diethyl carbonate 1. Avoid contact with oxidants, acids, reducing agents, alkalis and water. Two ethyl carbonate is flammable and should be kept away from fire sources. Fire extinguisher, carbon dioxide, carbon tetrachloride or dry chemical fire extinguishing agent should be used to extinguish fire. It is non-corrosive to metals.

2. Chemical properties: Diethyl carbonate reacts with sodium at room temperature and gradually decomposes into carbon dioxide and sodium ethanol. When heated to 110 C, the decomposition reaction accelerates. In the presence of sodium powder, acetone was treated in boiling ether and decomposed with acetic acid to produce acetoacetate. In the presence of sodium powder, ethyl acetate was used to treat boiling benzene, and dilute acetic acid was used to decompose it to form a small amount of diethyl malonate and acetoacetate. Diethyl carbonate can react with ketones and organic esters in the presence of metal alcohols. Diethyl carbonate also has the generality of general esters.

3. When using this reagent, inhalation should be avoided.

Properties and stability

In chemical production, it is used as solvent for cellulose nitrate, cellulose ether, synthetic resin and natural resin. Pharmaceutical earth is used in the manufacture of phenobarbital. The pesticide industry is used to make pyrethrums. Instrument industry is used to manufacture sealing fixing fluid. In analytical chemistry, it is used as chemical reagent and electrolyte composition of lithium ion batteries. It is also used in the preparation of special paint for vacuum tubes. In addition, diethyl carbonate is an important reagent and carrier for organic synthesis.

synthetic method

1. Anhydrous ethanol reacts with phosgene to form ethyl chloroformate, and then continues to react with ethanol to form diethyl carbonate. The finished product is then washed and distilled. Material consumption quota: ethanol 1450 kg/t, phosgene 2250 kg/t.

Storage method

1. Store in a cool, ventilated warehouse. Keep away from fire, heat source, water source and static electricity. It should be stored separately from oxidants, reducing agents, strong alkali and acidic substances. Mixed storage should not be avoided. Keep away from light. Equipped with the corresponding variety and quantity of fire fighting equipment. The storage area shall be equipped with emergency leak handling equipment and suitable storage materials.

toxicology data

1. Acute toxicity: rat oral LD50:15g/kg

2. The irritation is bigger than dimethyl carbonate. Diethyl carbonate is irritant to human tissues. When exposed to high concentration of vapor, eye, skin and mucosa should be protected.