α-Hexachlorocyclohexane (α-HCH) is an organochloride which is one of the isomers of hexachlorocyclohexane (HCH).^[1] It is a byproduct of the production of the insecticide lindane (γ-HCH) and it is typically still contained in commercial grade lindane used as insecticide. Lindane, however, has not been produced or used in the United States for more than 20 years.^[1] At ambient temperatures it is a stable, white, powdery solid substance. As of 2009, the Stockholm Convention on Persistent Organic Pollutants classified (α-HCH) and (β-HCH) as persistent organic pollutants (POPs), due to the chemical's ability to persistence in the environment, bioaccumulative, biomagnifying, and long-range transport capacity.

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α-hexachlorocyclohexane

Names
Preferred IUPAC name (1R,2R,3S,4S,5S,6S)-1,2,3,4,5,6-Hexachlorocyclohexane
Other names α-HCH α-Benzenehexachloride α-BHC alpha-hexacloran(e) alpha-Lindane
Identifiers
CAS Number	319-84-6 Y
3D model (JSmol)	Interactive image
ChemSpider	16740741 Y
ECHA InfoCard	100.005.702
EC Number	206-270-8
RTECS number	GV3500000
UNII	IVM9A2N49K Y
UN number	2761, 2811, 3082
CompTox Dashboard (EPA)	DTXSID2020684
InChI InChI=1S/C6H6Cl6/c7-1-2(8)4(10)6(12)5(11)3(1)9/h1-6H/t1-,2-,3-,4-,5+,6+/m0/s1 Y Key: JLYXXMFPNIAWKQ-LKPKBOIGSA-N Y InChI=1/C6H6Cl6/c7-1-2(8)4(10)6(12)5(11)3(1)9/h1-6H/t1-,2-,3-,4-,5+,6+/m0/s1 Key: JLYXXMFPNIAWKQ-LKPKBOIGBO
SMILES Cl[C@H]1[C@@H](Cl)[C@H](Cl)[C@H](Cl)[C@@H](Cl)[C@@H]1Cl
Properties
Chemical formula	C6H6Cl6
Molar mass	290.83 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

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