Persulfate

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The term persulfate refers to ions or compounds with more oxygen than normal sulfates.

These do not have sulfur in a different oxidation state; rather, they contain peroxide units, where two oxygens take the place of one in a normal sulfate; the oxygen atoms are in oxidation state −1.

The main forms are peroxomonosulfates and peroxodisulfates.

Ions

Acids

Example salts