<unk> , also known by many other names (see Table) is the chemical compound with the formula<unk> . It is a reagent in synthetic chemistry and was formerly widely used in fire extinguishers and as a precursor to refrigerants.  It is a colorless liquid with a "sweet" smell that can be detected at low levels.
Both<unk>  and tetrachloromethane are acceptable names under IUPAC nomenclature, depending on whether it is seen as an inorganic or an organic compound.  Colloquially, it is called<unk>  tet".
Carbon tetrachloride
Trichloroethylene
Tetrachloroethylene
Acetylene tetrabromide
Metolachlor
Formaldehyde
Nitrazine
Toluene