Lugol's iodine solution is a starch indicator, chemical reagent, and biological stain. This chemical stains carbohydrates in plant and animal specimens brown or blue-black and stains glycogen red. This 30 ml bottle is an aqueous solution of 1.8% iodine and 3.0% potassium iodide.
This iodine solution is water-based. Iodine (tincture) is commonly available in drug stores, is alcohol-based, and may be unsuitable for some experiments calling for iodine solution.
This iodine is laboratory grade and cannot be used for food or medical purposes.
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