hclo3

from The Collaborative International Dictionary of English v.0.48

Chloric \Chlo"ric\, a. [From {Chlorine}.]
   Pertaining to, or obtained from, chlorine; -- said of those
   compounds of chlorine in which this element has a valence of
   five, or the next to its highest; as, chloric acid, {HClO3}.
   [1913 Webster]

   {Chloric ether} (Chem.), ethylene dichloride. See {Dutch
      liquid}, under {Dutch}.
      [1913 Webster]