At its roots, the history of chemical explosives lies in the history of gunpowder. See also: History of gunpowder The Great Western Powder Company of Toledo, Ohio, a producer of explosives, seen in 1905Įarly thermal weapons, such as Greek fire, have existed since ancient times. Certain materials-dusts, powders, gases, or volatile organic liquids-may be simply combustible or flammable under ordinary conditions, but become explosive in specific situations or forms, such as dispersed airborne clouds, or confinement or sudden release. The distinction, however, is not razor-sharp. In contrast, some materials are merely combustible or flammable if they burn without exploding. The remainder are too dangerous, sensitive, toxic, expensive, unstable, or prone to decomposition or degradation over short time spans. Sensitive materials that can be initiated by a relatively small amount of heat or pressure are primary explosives and materials that are relatively insensitive are secondary or tertiary explosives.Ī wide variety of chemicals can explode a smaller number are manufactured specifically for the purpose of being used as explosives.
Explosives may also be categorized by their sensitivity.
Materials that detonate (the front of the chemical reaction moves faster through the material than the speed of sound) are said to be "high explosives" and materials that deflagrate are said to be "low explosives".
For the American band, see The Explosives.
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