Sulfuric acid (chemical formula: H2SO4), the most important oxygen containing sulfur acid. Sulfate is a colorless oily liquid, the crystallization of 10.36 degrees, usually using a variety of different concentrations of aqueous solution of the tower method and contact method. The former is the crude dilute sulfuric acid mass fraction is generally around 75% the latter can be obtained; the mass fraction of 98.3% pure sulfuric acid, the boiling point of 338 DEG C, the relative density is 1.84.

Sulfuric acid is an inorganic acid two yuan the most lively, and many metal reaction. High concentration of sulfuric acid has strong water absorption, can be used as dehydrating agent, carbonized wood, paper, cotton fabric and other biological flesh carbohydrate containing substances. When mixed with water, will release a lot of heat energy. It has strong corrosion and oxidation, so it needs to be used with caution. It is an important industrial raw material, can be used in the manufacture of fertilizers, drugs, explosives, paints, detergents, batteries and so on, is also widely used in the purification of petroleum, metal smelting and dye industry, commonly used as a chemical reagent in organic synthesis can be used as dehydrating agent and sulfonating agent.