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Introduction
This document supersedes the “Draft guidance on best available techniques and best environmental practices for the production and use of hexabromocyclododecane (HBCD) listed with specific exemptions under the Stockholm Convention” of January 2017 1 , to include updated information pursuant to decision SC-9/7 on best available techniques and best environmental practices.
Substance covered under this document
In May 2013, by decision SC-6/13, the Conference of the Parties to the Stockholm Convention listed HBCD into Annex A of the Convention. The listing includes specific exemptions for production as allowed for the Parties listed in the register of specific exemptions and for use in expanded polystyrene (EPS) and extruded polystyrene (XPS) in buildings in accordance with the provisions of Part VII of the Annex as follows:
| Chemical | Activity | Specific exemption |
| Hexabromocyclododecane | Production | As allowed for the parties listed in the Register in accordance with the provisions of Part VII of this Annex |
| Use | Expanded polystyrene and extruded polystyrene in buildings in accordance with the provisions of Part VII of this Annex | |
In accordance with Part III of Annex A, “Hexabromocyclododecane” means hexabromocyclododecane (CAS No: 25637-99-4), 1,2,5,6,9,10-hexabromocyclododecane (CAS No: 3194-55-6) and its main diastereoisomers: alpha-hexabromocyclododecane (CAS No: 134237-50-6); betahexabromocyclododecane (CAS No: 134237-51-7); and gamma-hexabromocyclododecane (CAS No: 134237-52-8).
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