substance: means a chemical element and its compounds in the natural state or obtained by any manufacturing process, including any additive necessary to preserve its stability and any impurity deriving from the process used, but excluding any solvent which may be separated without affecting the stability of the substance or changing its composition;
Snov: pomeni kemijski element in njegove spojine v naravnem stanju ali pridobljene s kakršnim koli proizvodnim procesom, vključno z vsemi dodatki, potrebnimi za ohranitev njene obstojnosti, in vsemi nečistotami, ki nastanejo pri uporabljenem procesu, ne vključuje pa topil, ki se lahko izločijo, ne da bi to vplivalo na obstojnost snovi ali spremenilo njeno sestavo.