Perrhenic acidPerrhenic acid is the chemical compound with the formula Re2O7(H2O)2. It is obtained by evaporating aqueous solutions of Re2O7. Conventionally, perrhenic acid is considered to have the formula HReO4, and a species of this formula forms when rhenium(VII) oxide sublimes in the presence of water or steam. Read from the Chembox of the Wikipedia article Perrhenic acid, revision 1380026731.

Property

Value

Formula

H4O9Re2, 520.44 g/mol

pKa

-1.25

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