In the chemical industry sulphuric acid is one of the important compounds. This chemical is used in making hundreds of compounds by the chemical industry. By far the largest amount of sulphuric acid is used to make phosphoric acid, used in turn to make phosphate fertilizer, calcium dihydrogen phosphate and aluminum phosphate. lt is also used to make ammonium sulphate, which is a particularly important fertilizer in sulphur deficient. Due to the following reasons sulphuric acid is highly used in chemical industry.