Table of standard reduction potentials for half-reactions important in biochemistry
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The values below are standard reduction potentials for half-reactions measured at 25°C, 1 atmosphere and a pH of 7 in aqueous solution.
| Half-reaction | Δξ°'(V) |
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| CH3COOH + 2 H+ + 2 e- → CH3CHO + H2O | -0.581 |
| 2 H+ + 2 e- → H2 | -0.421 |
| NADP+ + H+ + 2 e- → NADPH | -0.320 |
| FAD + 2 H+ + 2 e- → FADH2 (coenzyme bonded to flavoproteins) | ~0 |
| O2 + 2 H+ + 2 e- → H2O2 | +0.295 |
| 1/2 O2 + 2 H+ + 2 e- → H2O | +0.815 |
| P680+ + e- → P680 | ~ +1.0 |