Lugol's Solution, often used as an antiseptic and disinfectant, for emergency disinfection of drinking water and equipment, and as a reagent for starch detection in routine laboratory and medical tests. Also used as a mordant when performing Gram Stain procedures and as a key component stain in a Schiller's Test. It is even used, at times, to replenish iodine deficiency. Extremely pure Lugol's solution