This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
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.
A colorless liquid of oily consistence and very caustic and corrosive. Sp. gr., not below 1.835.
Alkalies, their carbonates, lead and calcium salts.