Reduction Potentials

1,4-Naphthoquinone-2-sulfonate ion

(R² = SO₃^–)

Ilan, Y.A.; Czapski, G.; Meisel, D.
Biochim. Biophys. Acta 430(2): 209-24 (1976)

E = –60(mV), ionic strength = 0.1, pH = 7

Reference compound: O₂ (1 atm.)
Reference E: –330 mV
Co-solute: HCO₂^–

Concentrations used to estimate equilibrium constant.