When measuring extreme chemical acidity, superacids such as fluoroantimonic acid—formed by combining hydrogen fluoride and antimony pentafluoride—surpass pure sulfuric acid by millions of times, protonating almost any organic compound. In terms of physical material strength rather than molecular reactivity, synthetic substances like carbon nanotubes, graphene sheets, and boron nitride structures exhibit the highest tensile strength and resistance to deformation known to materials science.