According to the classical definition, a superacid is an acid with an acidity greater than that of 100% pure sulfuric acid, which has a Hammett acidity function of −12. According to the modern definition, a superacid is a medium in which the chemical potential of the proton is higher than in pure sulfuric acid.

What is superacid example?

Commercially available superacids include trifluoromethanesulfonic acid (CF₃SO₃H), also known as triflic acid, and fluorosulfuric acid (HSO₃F), both of which are about a thousand times stronger (i.e. have more negative H₀ values) than sulfuric acid. ... A strong superacid of this kind is fluoroantimonic acid.

What is the strongest superacid?

Fluoroantimonic acid is the strongest superacid based on the measured value of its Hammett acidity function (H₀), which has been determined for different ratios of HF:SbF₅.