2. An “explosive” means:
(a)(i)a substance or preparation which creates the risk of an explosion by shock, friction, fire or other sources of ignition (risk phrase R2).
(ii)a pyrotechnic substance being a substance (or mixture of substances) designed to produce heat, light, sound, gas or smoke or a combination of such effects through non-detonating self-sustained exothermic chemical reactions, or
(iii)an explosive or pyrotechnic substance or preparation contained in objects;
(b)a substance or preparation which creates extreme risks of explosion by shock, friction, fire or other sources of ignition (risk phrase R3).