<unk> , also known by many other names (such as tetrachloromethane, also recognised by the IUPAC,<unk>  tet in the cleaning industry, Halon-104 in firefighting, and Refrigerant-10 in HVACR) is an organic compound with the chemical formula<unk> . It is a colourless liquid with a "sweet" smell that can be detected at low levels. It is practically not flammable at lower temperatures. It was formerly widely used in fire extinguishers, as a precursor to refrigerants and as a cleaning agent, but has since been phased out because of environmental and safety concerns. Exposure to high concentrations of<unk>  (including vapor) can affect the central nervous system and degenerate the liver and kidneys. Prolonged exposure can be fatal.
Carbon tetrachloride
Arsenic trichloride
Butylated hydroxytoluene
Tetrachlorodecaoxide
Triphenylchloroethylene
Coal tar
Vinyl chloride
Arsenic trioxide