pyrosulfuric acid
noun Chemistry.
an oily, hygroscopic, corrosive liquid, H2S2O7, that, depending on purity, is colorless or dark brown: used chiefly as a dehydrating agent in the manufacture of explosives and as a sulfating or sulfonating agent in the manufacture of dyes.
Also called
fuming sulfuric acid,
oleum.
Origin of pyrosulfuric acid
First recorded in 1870–75
Words nearby pyrosulfuric acid
pyroracemic acid,
pyrosis,
pyrostat,
pyrosulfate,
pyrosulfuric,
pyrosulfuric acid,
pyrosulphate,
pyrosulphuric acid,
pyrotechnic,
pyrotechnician,
pyrotechnics
Scientific definitions for fuming sulfuric acid
pyrosulfuric acid
[ pī′rō-sŭl-fyur′ĭk ]
A heavy, oily, colorless to dark brown liquid produced by adding sulfur trioxide to concentrated sulfuric acid. It is used in petroleum refining and the manufacture of explosives. Chemical formula: H2S2O7.