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Physical & Chemical properties

Dissociation constant

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Description of key information

Trifluoromethanesulfonic acid belongs to the class of superacids, it has a pKa<0.

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Additional information

Trifluoromethanesulfonic acid belongs to the class of superacids, which are defined as stronger than 100% sulfuric acid. The standard way to classify acid strengths regarding their ionic dissociation in water is not applicable to superacids since they are all fully dissociated in aqueous solution (pKa<0).