Product Does Not ExpireCarlyle's Lugol's Iodine Solution 2% Solution does not expire because iodine is a natural preservative and antiseptic. Please note that you will not find an expiration date on the product, but rest assured this product is not expired. Easy-To-Use Iodine DropsLugol's Iodine (2 percent) Solution comes in a convenient dropper bottle for easy use. This 2% solution contains 2% iodine, 4% Potassium Iodide USP and 94% Distilled Water. Carlyle Lugol's Iodine Solution has a deep red color to it and it is not decolorized. About Iodine:Iodine is an important trace element that is essential to the human body. It can be found in certain vegetables, yogurt, cranberries, salt, and cheese. The organ that uses Iodine the most is the thyroid gland. Iodine is atomic number 53 on the periodic table of elements and has a molecular makeup. Common Uses of Iodine:Iodine has many common uses. In emergency first-aid and medical circumstances, it has been used as an antiseptic swab for wounds. Iodine can come in different forms like tincture, tablets, pills, ointments, creams and capsules. Carlyle Lugol's Iodine 2% Solution comes as a liquid solution in a dropper bottle. Different from Nascent Iodine, Lugol's 2% Solution is made up of 94% distilled water, 4% potassium iodide, and 2% pure iodine. For Talisman use only.