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Table 1 Approximate half-lives of reactive oxygen species (ROS)

From: Spectrophotometric assays for evaluation of Reactive Oxygen Species (ROS) in serum: general concepts and applications in dogs and humans

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
  1. Adapted from 12, 15, 18