# The Control of Major Accident Hazards Regulations 1999, Paragraph 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 R 2),
(ii) a pyrotechnic substance is 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 R 3).

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Source: https://www.legislation.gov.uk/uksi/1999/743/schedule/1/part/5/paragraph/2 (the official version)
Page: https://openlegislation.uk/control-of-major-accident-hazards-regulations-1999/schedule-1/part-5/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.