Fertilizer producers are the largest users of sulfuric acid, using it as a component of phosphoric acid to create phosphate fertilizers, calcium dihydrogenphosphate, and ammonium phosphates
Chemical manufacturers for making hydrochloric acid, nitric acid, phosphoric acid, and more
Crude oil refiners use this acid as a catalyst
Detergent manufacturers for sulfonating the active organic ingredients used in making synthetic detergents
Textile manufacturers to make rayon
Battery manufacturers (especially in the automotive industry) as an electrolyte to allow the flow of electrons between the battery’s plates
Agriculture for drying out the tops of plants for easier harvesting (such as potato farming)
Medical manufacturers (especially chemotherapy drug manufacturers) to manufacture the drugs that attack the DNA of cancer cells
Water treatment processes inject sulfuric acid into the RO feed to lower the pH
In the production of ethanol fuels and petrochemicals