Diethyl ether is a clear liquid chemical. It is often just called ether. Ether burns very easily and boils at about 35°C. It has a sweet smell and does not mix with water.
Ether was discovered in 1275. It was used in the past as a general anesthetic to make people unconscious during surgery. Now other chemicals are used because ether has side effects and can catch fire. Ether is used as a solvent by scientists for chemical reactions.