Division 1 The following uses of controlled substances other than hydrochlorofluorocarbons are considered as essential laboratory and analytical uses:

the use of controlled substances as a reference or standard:

• to calibrate equipment which uses controlled substances,

• to monitor emission levels of controlled substances,

• to determine residue levels of controlled substances in goods, plants and commodities;

the use of controlled substances in laboratory toxicological studies;

laboratory uses in which the controlled substance is transformed in a chemical reaction like controlled substances used as feedstock;

the use of methyl bromide inside a laboratory to compare the efficacy of methyl bromide and its alternatives;

the use of carbon tetrachloride as a solvent for bromination reactions involving N-bromosuccineimide;

the use of carbon tetrachloride as chain transfer agent in free-radical polymerisation reactions;

any other laboratory and analytical use for which a technically and economically feasible alternative is not available.