Potassium Iodide, High Purity USP Crystals, 99.8+%,500 Grams-L8

What the brand says

HIGHEST PURITY ON AMAZON!! Currently testing at 99.9% MADE IN USA. You are purchasing 500 grams of pure Potassium Iodide crystals. It is 99.8-99.9% pure min. This is the best quality Potassium Iodide you will find.