CCl 4 does not occur naturally, it is a clear liquid with sweet smell that can be detected at low levels [1,2]. Volatile organic compounds such as CCl 4 are a class of solvents to which many people are exposed occupationally and environmentally [2]. CCl 4 was formerly used for metal degreasing and as dry cleaning, fabricspotting, and fire extinguisher fluids, grain fumigant and reaction medium. Because of its