One electron redox potential of ROS and ROS scavengers, as originally compiled by Buettner,23 relative to the standard hydrogen electrode
| Couple . | E0/V . |
|---|---|
| HO˙, H+/H2O | 2.33 |
| O3˙−, 2H+/H2O + O2 | 1.80 |
| RO˙, H+/ROH (aliphatic alkoxyl radical) | 1.60 |
| HOO˙, H+/H2O2 | 1.06 |
| ROO˙, H+/ROOH (alkylperoxyl radical) | 1.00 |
| O2˙−, 2H+/H2O2 | 0.94 |
| RS˙/RS− (cysteine) | 0.92 |
| O3/O3˙− | 0.89 |
| 1O2/O2˙− | 0.65 |
| Catechol-O˙, H+/catechol-OH | 0.53 |
| α-Tocopheroxyl˙, H+/α-tocopherol (TO˙, H+/TOH) (vitamin E) | 0.50 |
| Trolox C (TO˙, H+/TOH) | 0.48 |
| H2O2, H+/H2O, ˙OH | 0.32 |
| Ascorbate˙, H+/ascorbate monoanion (vitamin C) | 0.28 |
| Semiubiquinone, H+/ubiquinol (CoQ˙−, 2H+/CoQH2) | 0.20 |
| Ubiquinone, H+/semiubiquinone (CoQ/CoQ˙−) | −0.036 |
| Dehydroascorbic/ascorbate˙− | −0.17 |
| O2/O2˙− | −0.33 |
| Methyl viologen (MV2+)/MV˙+ | −0.45 |
| O2, H+/HO2˙ | −0.46 |
| RSSR/RSSR˙− (cysteine or glutathione) | −1.50 |
| Couple . | E0/V . |
|---|---|
| HO˙, H+/H2O | 2.33 |
| O3˙−, 2H+/H2O + O2 | 1.80 |
| RO˙, H+/ROH (aliphatic alkoxyl radical) | 1.60 |
| HOO˙, H+/H2O2 | 1.06 |
| ROO˙, H+/ROOH (alkylperoxyl radical) | 1.00 |
| O2˙−, 2H+/H2O2 | 0.94 |
| RS˙/RS− (cysteine) | 0.92 |
| O3/O3˙− | 0.89 |
| 1O2/O2˙− | 0.65 |
| Catechol-O˙, H+/catechol-OH | 0.53 |
| α-Tocopheroxyl˙, H+/α-tocopherol (TO˙, H+/TOH) (vitamin E) | 0.50 |
| Trolox C (TO˙, H+/TOH) | 0.48 |
| H2O2, H+/H2O, ˙OH | 0.32 |
| Ascorbate˙, H+/ascorbate monoanion (vitamin C) | 0.28 |
| Semiubiquinone, H+/ubiquinol (CoQ˙−, 2H+/CoQH2) | 0.20 |
| Ubiquinone, H+/semiubiquinone (CoQ/CoQ˙−) | −0.036 |
| Dehydroascorbic/ascorbate˙− | −0.17 |
| O2/O2˙− | −0.33 |
| Methyl viologen (MV2+)/MV˙+ | −0.45 |
| O2, H+/HO2˙ | −0.46 |
| RSSR/RSSR˙− (cysteine or glutathione) | −1.50 |