Acetone is a seven-letter word that is a building block of organic chemistry. It is a colorless, volatile, flammable liquid with a distinct odor. ACETONE is a common solvent used in many industries, including pharmaceuticals, cosmetics, and paint. It is also used as a fuel additive and as a cleaning agent. ACETONE is a key component of many organic compounds, such as acetylsalicylic acid (aspirin) and polyvinyl chloride (PVC).