Diethyl ether, or simply ether, is an organic compound in the ether class with the formula C4H10O, (CH3CH2)2O or (C2H5)2O, sometimes abbreviated as Et2O. It is a colourless, highly volatile, sweet-smelling, extremely flammable liquid. It is commonly used as a solvent in laboratories and as a starting fluid for some engines. It was formerly used as a general anesthetic, until non-flammable drugs were developed, such as halothane. It has been used as a recreational drug to cause intoxication.
The first use of ether in dental surgery, by Ernest Board.
Panel from Ether Monument in Boston commemorating Morton's demonstration of ether's anesthetic use.
An illustration depicting ether's effects, 1840s–1870s
Phenol is an aromatic organic compound with the molecular formula C6H5OH. It is a white crystalline solid that is volatile. The molecule consists of a phenyl group bonded to a hydroxy group. Mildly acidic, it requires careful handling because it can cause chemical burns.
Phenol
Amine to phenol