In the<unk>  molecule, four chlorine atoms are positioned symmetrically as corners in a tetrahedral configuration joined to a central<unk>  atom by single covalent bonds. Because of this symmetric geometry,<unk>  is non-polar. Methane gas has the same structure, making<unk>  a halomethane. As a solvent, it is well suited to dissolving other non-polar compounds such as fats, and oils. It can also dissolve iodine. It is somewhat volatile, giving off vapors with a smell characteristic of other chlorinated solvents, somewhat similar to the tetrachloroethylene smell reminiscent of dry cleaners' shops. Solid tetrachloromethane has two polymorphs: crystalline II below −47.5 °C (225.6 K) and crystalline I above −47.5 °C. At −47.3 °C it has monoclinic crystal structure with space group C2/c and lattice constants a = 20.3, b = 11.6, c = 19.9 (.10−1 nm), β = 111°. With a specific gravity greater than 1,<unk>  will be present as a dense nonaqueous phase liquid if sufficient quantities are spilled in the environment.
Carbon tetrachloride
Arsenic trichloride
Butylated hydroxytoluene
Tetrachlorodecaoxide
Triphenylchloroethylene
Coal tar
Vinyl chloride
Arsenic trioxide