Sulfuric acid, also spelled sulphuric acid, known by the chemical compound H2SO4, and originally known as the oil of vitroil, is a highly corrosive mineral acid with enough dissolving power to burn the flesh off people. It is recognizable as having a colorless/slightly yellow coloring with a pungent ethereal nature and is soluble with water in all concentrations. Because of it not immediately being recognizable, it is frequently dyed dark brown to alert people of its danger. It can be neutralized if caustic soda is placed over it, and can also produce carbon to transform into a rubbery substance if anything containing table sugar (C12H22O11) is exposed to it.