• A white odorless crystalline solid, C<sub>10</sub>Cl<sub>12</sub>, formerly used as an insecticide against ants and as a fire retardant. It was banned in the United States in 1978 because of its effects on the environment and possibly on human health.
  • The <xref>pesticide</xref> and <xref>fire retardant</xref> perchloropentacyclodecane that is a <xref>persistent</xref>, <xref>bioaccumulative</xref>, and <xref>toxic</xref> <xref>pollutant</xref>
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