Pyrosulphuric

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Pyrosulphuric \Pyr`o*sul*phu"ric\, a. [Pyro- + -sulphuric.]
     (Chem.)
     Pertaining to, or designating, an acid called also
     {disulphuric} acid) obtained by distillation of certain
     sulphates, as a colorless, thick, oily liquid, {H2S2O7}
     resembling sulphuric acid. It is used in the solution of


     indigo, in the manufacture of alizarin, and in dehydration.
     [1913 Webster]