Ozone (O3) can be found as a naturally ocurring gas in the upper atmosphere. It is often used as a safe (FDA approved) but very powerful disinfectant (3,000 times faster than bleach).

Rapidly oxidizes bacteria it comes in contact with, then reverts safely back into Oxygen (O2), making it one of the most environmentally friendly cleaning methods available.
Effectively deodorizes, disinfects, and destroys bacteria, fungi, allergens, and other odor-causing agents.
Has long been used in water treatment, food sterilization and medical therapies for its remarkable anti-viral, anti-fungal, and anti-bacterial properties.