(1) Subject to subregulation (2), in these Regulations:
"controlled chemical" means:
(a) an active constituent or chemical product listed in Part 2 of Schedule 1; or
(b) a chemical product containing an active constituent referred to in paragraph (a); or
(c) the chemical product listed as an item in Part 3 of Schedule 1;
(d) mercury that is to be used as an active constituent in a proposed or existing chemical product; or
(e) a chemical product that is mercury; or
(f) a chemical product that is a mercury - added product.
(2) To avoid doubt, if the heading of an item in Part 2 of Schedule 1 includes the words 'and its compounds' or other words describing all compounds, or all compounds of a particular kind (such as, for example, 'and its salts and esters') of the relevant chemical, all compounds, or all such compounds, of the chemical are also controlled chemicals.