h2s2o7

2 definitions found

h2s2o7 - Collaborative International Dictionary of English v.0.48 :

  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]

  Disulphuric \Di`sul*phu"ric\, a. [Pref. di- + sulphuric.]
     (Chem.)
     Applied to an acid having in each molecule two atoms of
     sulphur in the higher state of oxidation.
     [1913 Webster]
  
     Disulphuric acid, a thick oily liquid, H2S2O7, called
        also Nordhausen acid (from Nordhausen in the Harts,
        where it was originally manufactured), fuming sulphuric  acid
        , and especially pyrosulphuric acid. See under
        Pyrosulphuric.
        [1913 Webster]