Perfluorodecanesulfonic acid is a chemical compound from the group of perfluorosulfonic acids within the per- and polyfluorinated alkyl compounds (PFAS). The chemical formula is . Perfluorodecanesulfonic acid is a persistent organic pollutant, known for its strong resistance to degradation.

Occurrence Perfluorodecanesulfonic acid is a micropollutant found in marine organisms and sewage sludge.

Physical properties Perfluorodecanesulfonic acid forms a dark brown to black solid.

Use Perfluorodecanesulfonic acid, as a very strong acid, can be used as a catalyst for regioselective alkylations and organic synthesis.

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