Table 1 Approximate half-lives of reactive oxygen species (ROS)
Molecule | Half-Life (at 37 °C) | |
|---|---|---|
Free radicals | O2•− | 10− 6 s |
OH• | 10−9 s | |
ROO• | 7 s | |
RO• | 10−6 s | |
Nonradicals | 1O2 | 10− 6 s |
H2O2 | chemically stable | |
ROOH | In some cases, such as some PrOOH, until 2 h | |