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Perchloric acid is a mineral acid with the formula HClO4.
P 1444 (OTTO) Perchloric acid 70%, 99.999% trace metals basis Cas 7601-90-3 - used as a reagent for the preparation of fluorinated polymer electrolytes using poly (vinylidenefluoride-cohexafluoropropylene) (PVDF-HFP) for fuel cell applications.