It is particularly good that the ban on hexachlorocyclohexane (HCH),including lindane, is included in the proposal.
Because of this waste isomer problem, the production of hexachlorocyclohexane/Lindane has been a worldwide problem for years.
Other routes which are believed to have been used to some extent are the chlorination of hexachlorocyclohexane isomers with sulphuryl chloride or chlorosulphonic acid in the presence of a ferric chloride or other catalyst, and the distillation of heavy-end residues from perchloroethylene production.
Technical hexachlorocyclohexane contains mainly five isomers: alpha hexachlorocyclohexane, beta hexachlorocyclohexane, gamma hexachlorocyclohexane, delta hexachlorocyclohexane and epsilon hexachlorocyclohexane.
Adopts the risk management evaluation for alpha hexachlorocyclohexane found in document UNEP/POPS/POPRC./15/Add.;
Adopts the risk management evaluation for alpha hexachlorocyclohexane set out in document UNEP/POPS/POPRC./15/Add.;
At its third meeting, the Persistent Organic Pollutants Review Committee adopted decision POPRC-3/10 on beta hexachlorocyclohexane.
Assessment of lindane and other hexachlorocyclohexane isomers, USEPA, 2006.
Because of this waste isomer problem, the production of hexachlorocyclohexane lindane has been a worldwide problem for years...
Concluding statement for alpha and beta hexachlorocyclohexane