Sulphuric acid is arguably the most widely used and most important chemicals in the world.

It is a strong acid made up of Hydrogen, Oxygen and Sulphur. It has a chemical with the formula H2SO4. It has a strong pungent smell and is extremely corrosive in nature. It is also a strong oxidizing agent and reacts readily at high temperatures with many metals, carbon and other substances. It also called oil of vitriol, or hydrogen sulfate, dense, colourless, oily, corrosive liquid; one of the most commercially important of all chemicals. It is prepared industrially by the reaction of water with sulfur trioxide (see sulfur oxide), which in turn is made by chemical combination of sulfur dioxide and oxygen either by the contact process or the chamber process. In various concentrations the acid is used in the manufacture of fertilizers, pigments, dyes, drugs, explosives, detergents, and inorganic salts and acids, as well as in petroleum refining and metallurgical processes