Exceptions to the prohibition
4. Hexachloroethane may be used in the manufacturing or processing of non-ferrous metals–
(a)for research and development or analysis purposes;
(b)in non-integrated aluminium foundries producing specialised castings for applications requiring high quality and high safety standards and where consumption is less than 1.5 kilogrammes of hexachloroethane per day on average; and
(c)for grain refining in the production of the magnesium alloys AZ81, AZ91 and AZ92.