2,2,2-Trichloroethanol is an organic compound related to ethanol, except the hydrogen atoms at position 2 are replaced with chlorine atoms. In humans, its pharmacological effects are similar to those of its prodrugs, chloral hydrate and chlorobutanol. It has, historically, been used as a sedative hypnotic. The hypnotic drug triclofos is metabolized in vivo to 2,2,2-trichloroethanol. Chronic exposure may result in kidney and liver damage.
2,2,2-Trichloroethanol can be added to SDS-PAGE gels in order to enable fluorescent detection of proteins without a staining step. This imaging step is compatible with later analysis by, e.g., immunoblotting.