Uses
In the laboratory, triflic acid is useful in protonations because the conjugate base of triflic acid is non-nucleophilic. It is also used as an acidic titrant in non-aqueous acid-base titration because it behaves as a strong acid in many solvents (acetonitrile, acetic acid, etc.) where common mineral acids (such as HCl or H2SO4) are only moderately strong.
Read more about this topic: Trifluoromethanesulfonic Acid