What is Tincture of iodine?
'''Tincture of iodine''' is a [[disinfectant]]. It has [[iodine]] and [[potassium iodide]] dissolved in [[ethanol]] and water. Normally, iodine does not dissolve in water. But when ''potassium iodide'' is added, the iodine can dissolve. Also, ethanol helps iodine dissolve. Tincture of iodine has about equal amounts of iodide and iodine. It is not suitable for consumption. There are two types of tincture of iodine: '''USP Tincture of Iodine''': for every 100 mL, it has 1.8 to 2.2 grams of iodine, 2.1 to 2.6 grams of sodium iodide, and 50mL ethanol. The rest is water. '''USP Strong Iodine Tincture''': for every 100 mL, it has 6.8 to 7.5 grams of iodine, 4.7 to 5.5 grams of potassium iodide, and 50 mL ethanol. The rest is water. It can be used as a skin disinfectant and as a water disinfectant. It is used to disinfect minor cuts, burn and scratches. Because it has iodine in it, it is toxic in large amounts. [[Lugol's iodine]] is an alcohol-free version. It is commonly used in experiments in middle school science labs. It is an alcoholic solution of iodine. {{chem-stub}} [[Category:Chemicals]]