Oxidant

Standard Reduction Potential, E0 (V)

Hydroxyl radical

(H2O/OH)

2.80

Ozone

(O2/O3)

2.07

Peroxodisulfate

( SO 4 2 / S 2 O 8 2 )

2.01

Hydrogen peroxide

(H2O/H2O2)

1.77

Permanganate ion

( MnO 2 / MnO 4 )

1.67

Hypochlorous acid

(Cl/HOCl)

1.48

Chlorine

(Cl/Cl2)

1.36

Dichromate

( Cr 3 + / Cr 2 O 7 2 )

1.23

Oxygen

(H2O/O2)

1.23

Hypochlorite

(Cl/ClO)

0.81