Tetrachloroethylene, also known as perchloroethylene or PERC, is a colorless, non-flammable liquid commonly used as a solvent in dry cleaning and degreasing processes. It has a sweet odor and is effective in dissolving oils and fats, making it popular in various industrial applications. Due to its potential health risks, including effects on the liver and nervous system, the use of tetrachloroethylene is regulated in many countries. It can also contaminate groundwater, leading to environmental concerns. Proper handling and disposal are essential to minimize its impact on human health and the environment.