Lugols Iodine (Potassium Triiodide 6.6%) USP 2 Oz

What the brand says

Lugols Iodine contains iodine derived from natural seaweed and ancient natural underground saltwater deposits, Potassium derived from Canadian potash mines., and Pure water distilled from natural Sierra mountain spring water. No expiration or reduction of potency over time - remains fresh indefinitely without refrigeration. Store tightly sealed in a cool dark place. Keep away from direct sunlight. Keep out of reach of children.