Tetrachloroethylene (TE), also known as perchloroethylene, is a colorless liquid with a distinctive odor. It is stable at room temperature, but can decompose into highly toxic substances when exposed to light, moisture, or high temperatures. Its chemical formula is C₂Cl₄, with a molecular weight of 165.83, a density of 1.622 g/cm³, and a boiling point of 121°C. It is insoluble in water but soluble in organic solvents such as ethanol and ether.