Persulfuric acid, Peroxodisulfuric acid
3D model (JSmol)
CompTox Dashboard (EPA)
|Melting point||65 °C (149 °F; 338 K) (decomposes)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Peroxydisulfuric acid is the inorganic compound with the chemical formula H2S2O8. Also called Marshall's acid after its inventor Professor Hugh Marshall, it is a sulfur oxoacid. In structural terms it can be written HO3SOOSO3H. It contains sulfur in its +6 oxidation state and a peroxide group. Its salts, commonly known as persulfates, are industrially important as powerful oxidizing agents.
The acid is prepared by the reaction of chlorosulfuric acid with hydrogen peroxide:
Another method is the electrolysis of moderately concentrated sulfuric acid (60-70%) with platinum electrodes at high current density and voltage: