ABSTRACT
Hexachlorocyclohexane (HCH) is a six-chlorine substituted cyclohexane; it collectively represents the eight isomers of 1,2,3,4,5,6-hexachlorocyclohexane. Named by Greek letters (α, β, γ, δ, ζ, η and θ), these isomers differ in the spatial orientations and their axial equatorial substitution around the ring (Figure 7.1 and Table 7.1). Among the isomers, α-HCH is constituted of two enantiomers.
