Wolcure Iodine Tincture 2.5% W/V Solution is an antiseptic solution that eliminates the growth of bacteria and viruses. It contains 2.5% potassium iodide dissolved in a mixture of ethanol & water. It is also known as tincture of iodide, and is often found in emergency survival kits, used both to disinfect wounds and to sanitize surface water for drinking. Small amounts may be added to suspect drinking water as a disinfectant (typically 5 mg free iodine per liter, or 5 drops of 2% tincture). Iodine solution is used to sanitize the surface of fruit and vegetables from bacteria and viruses.