Perchloromethane is a chemical compound composed of one carbon atom and four chlorine atoms. It is also known as tetrachloromethane, or carbon tetrachloride. Perchloromethane is a colorless, heavy liquid that is highly toxic and can cause liver and kidney damage in humans. Due to its hazardous nature, it has been phased out in many industrial applications. Other synonyms for perchloromethane include tetraform, carbon tet, benzinoform, Freon 10, Halon 104, and methane tetrachloride. These names reflect both its chemical composition and its use in various industries, such as refrigeration, fire suppression, and tanning.