Tags: Chemical Compound, Chemical Substance.
4-Hydroxy-TEMPO or TEMPOL formally 4-hydroxy-2266-tetramethylpiperidin-1-oxyl is a heterocyclic compound. Like the related TEMPO it is used as a catalyst and chemical oxidant. In medicine it is recognized as an agent for detoxifying reactive oxygen species. It catalyses the disproportionation of superoxide.