<unk>  <unk>  is a chemical compound with the molecular formula C6HCl5 which is a chlorinated aromatic hydrocarbon. It consists of a benzene ring substituted with five chlorine atoms.<unk>  was once used industrially for a variety of uses, but because of environmental concerns there are currently no large scale uses of<unk> .<unk>  is a known persistent organic pollutant (POP) and banned globally by the Stockholm Convention on Persistent Organic Pollutants in 2009.
Pentachlorobenzene
Coal tar
Vinyl chloride
Triphenylchloroethylene
Hexachlorobenzene
Butylated hydroxytoluene
Benzene
Polychlorinated biphenyl