mercury bichloride

from The Collaborative International Dictionary of English v.0.48

mercury bichloride \mercury bichloride\ n.
   the compound ({HgCl2}) consisting of two atoms of chlorine
   united with one atom of mercury. Also called {bichloride of
   mercury}, {mercuric chloride}, {corrosive sublimate}, and
   {mercury perchloride}. It is used as "a topical antiseptic
   and disinfectant for inanimate objects". --Stedman's 25th
   [PJC]