carbon tetrachloride
a volatile industrial solvent that, when inhaled, can produce euphoria, disorientation and depersonalization, and other behavioral effects similar to those produced by the major sedatives. Continued use can lead to the rapid development of persisting dementia, as well as severe physical problems and death. Due to its adverse health effects and because it is known to deplete the ozone layer, carbon tetrachloride is no longer in common use. See also inhalant.