Pentobarbital has been used or considered as a substitute for other drugs traditionally used for capital punishment in the United States when they are in short supply.  Such use however is illegal under Danish law, and when this was discovered, after public outcry in Danish media, Lundbeck, the owner of the drug, stopped selling it to US states that impose the death penalty . US distributors of the drug are forbidden by the owner to sell it to any customers, such as several state authorities, that practice or participate in executions of humans. 
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 (2,2,2-trichloroethyl phosphate) 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, ., immunoblotting.