Acidum Sulphuricum. Sulphuric Acid. Synonym.- Oil of Vitriol. A liquid composed of not less than 92.5 per cent., by weight, of absolute Sulphuric Acid (H2So4=97.82) and 7.5 per cent. of water.

Source

Produced by the combustion of Sulphur or Iron Pyrites, and the oxidation and hydration of the resulting Sulphur Dioxide gas by means of nitrous and aqueous vapors. 2Hno3+2So2+H2O=2H2So4+N2O3. N2O3 +2So2+O2+H2O=2So2,Ohno2. 2So2,Ohno2+H2O=2H2So4+N2O3.

Characters

A colorless liquid of oily consistence and very caustic and corrosive. Sp. gr., not below 1.835.

Impurities

Nitric acid, lead, and arsenic.

Incompatibles

Alkalies, their carbonates, lead and calcium salts.

Preparations