It evaporates easily, is flammable, and dissolves in water. Acetone is used to make plastic, fibers, drugs, and other chemicals. It is also used to dissolve other substances. It occurs naturally in plants, trees, volcanic gases, forest fires, and as a product of the breakdown of body fat. It is present in vehicle exhaust, tobacco smoke, and landfill sites.
Industrial processes contribute more acetone to the environment than natural processes.
In air, about one-half of the total amount breaks down from sunlight or other chemicals every 22 days. It moves from the atmosphere into the water and soil by rain and snow. It also moves quickly from soil and water back to air. Acetone doesn't bind to soil or build up in animals. It's broken down by microorganisms in soil and water.