Potassium iodide is a salt, similar to table salt.
Potassium iodide is the ingredient that is routinely added to table salt to make it A iodized. The purpose of radiological emergency preparedness is to protect people from the effects of radiation exposure after an accident at a nuclear power plant. However, there may be situations when evacuation is not feasible or is delayed. In-place sheltering is an effective protective action in such a situation. Potassium iodide is a reasonable, prudent and inexpensive supplement to evacuation and sheltering.