perchloroethylene, also known as perchloroethylene, is an organic compound with the chemical formula c2cl4 and is a colorless liquid. chinese name: tetrachloroethylene foreign name: tetrachloroethene alias: perchloroethylene chemical formula c2cl4 molecular weight 165.833 cas no. 127-18-4 einecs no. 204-825-9 melting point-22 ℃ boiling point 121 ℃ water solubility density1.622 g/cm³ appearance colorless liquid safety description...