Which statement about diethyl ether is accurate?

Which statement about diethyl ether is accurate?

• A. It is flammable
• B. It is nonflammable
• C. It is non-toxic
• D. It is safe to handle without precautions

Answer: (A)

Diethyl ether is highly flammable because it vaporizes readily at room temperature and forms flammable vapor–air mixtures even at ordinary conditions. Its very low flash point means a spark, flame, or heat source can ignite ether vapors long before the liquid itself seems hot. The vapors can also travel along surfaces and ignite from distant ignition sources, increasing the risk. An added hazard is that ether can form peroxides when exposed to air and light over time, and these peroxides can become explosive concentrates if not monitored. Because of these properties, it must be handled with proper precautions, such as using it in a fume hood, keeping containers tightly closed and away from heat or sparks, and using appropriate personal protective equipment. The statements that it is nonflammable, non-toxic, or safe to handle without precautions are not correct.

Diethyl ether is highly flammable because it vaporizes readily at room temperature and forms flammable vapor–air mixtures even at ordinary conditions. Its very low flash point means a spark, flame, or heat source can ignite ether vapors long before the liquid itself seems hot. The vapors can also travel along surfaces and ignite from distant ignition sources, increasing the risk. An added hazard is that ether can form peroxides when exposed to air and light over time, and these peroxides can become explosive concentrates if not monitored. Because of these properties, it must be handled with proper precautions, such as using it in a fume hood, keeping containers tightly closed and away from heat or sparks, and using appropriate personal protective equipment. The statements that it is nonflammable, non-toxic, or safe to handle without precautions are not correct.