Explosive substance
From PyroGuide
An explosive substance is a solid or liquid substance (or a mixture of substances) which is in itself capable by chemical reaction of producing gas at such a temperature and pressure and at such a speed as to cause damage to surroundings. Pyrotechnic substances are included even though they do not produce larges volumes of gases.
References
- Queensland Government : Queensland Code of Practice, Control of Outdoor Fireworks Displays - First Edition - 1 December 2003