The term persulfate (sometimes known as peroxysulfate) refers to ions or compounds containing the anions [SO5]2- or [S2O8]2-. The anion [SO5]2- contains one peroxide group per sulfur center, whereas in [S2O8]2-, the peroxide group bridges the sulfur atoms. In both cases, sulfur adopts the normal tetrahedral geometry typical for S(VI) oxidation state. These salts are strong oxidizers.
- Sodium peroxomonosulfate, Na2SO5
- Potassium peroxymonosulfate, KHSO5
- Sodium persulfate (sodium peroxydisulfate), Na2S2O8
- Ammonium persulfate (ammonium peroxydisulfate), (NH4)2S2O8