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.


© Webster 1913.

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