sulfuric acid or sulphuric acid is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with molecular formula h???so???. it is a colorless, odorless, and viscous liquid that is soluble in water and is synthesized in reactions that are highly exothermic. formula: h2so4molar mass: 98.079 g/moliupac id: sulfuric aciddensity: 1.83 g/cm³boiling point: 337 °cmelting