Ozone, also known as O3, is the free-radical form of oxygen used extensively for safely sanitizing and cleaning a wide variety of products on a commercial and industrial basis. It is a highly reactive gas that occurs naturally in the Earth’s upper and lower atmospheres, essentially natures disinfectant. It can also be man-made by way of an electrical discharge through pure oxygen or dry air. Ozone is the strongest disinfectant oxidant of the common disinfecting agents such as hydrogen peroxide, bleach, and iodine. It is a colourless gas and has an odor usually associated with the smell of the air during and after thunder storms.