isocyanuric acid

from The Collaborative International Dictionary of English v.0.48

Fulminuric \Ful"mi*nu"ric\, a. [Fulminic + cyanuric.] (Chem.)
   Pertaining to fulminic and cyanuric acids, and designating an
   acid so called.
   [1913 Webster]

   {Fulminuric acid} (Chem.), a white, crystalline, explosive
      substance, {H3C3N3O3}, forming well known salts, and
      obtained from the fulminates. It is isomeric with cyanuric
      acid, and hence is also called {isocyanuric acid}.
      [1913 Webster]