Tetrachloroethylene
Perchloroethylene is a colourless liquid at room temperature. It has a mild, sweet odour that most people can smell even in small amounts. It is much heavier than water and it does not mix with water, because Perc is nonpolar while water is polar. It can mix with many other solvents. Perc boils at 121 degrees Celsius and freezes at –22 degrees Celsius.