Abstract
Dangerous substances of Japanese Fire Service Law include substances that have a severe explosion hazard and may cause an explosion accident at a chemical factory. Recently, it has been used for bomb terrorism. Therefore, the danger of a substance having a high explosion risk was examined with calculation. In the past, explosives such as potassium perchlorate and ammonium nitrate were often used for bomb terrorism. Recently, organic peroxides such as acetone peroxide have been used as raw materials for homemade bombs. The magnitude of an explosion is mainly governed by the explosive power and amount of the substance, but some explosives have an explosive danger comparable to explosives. Organic peroxides such as TATP (Acetone peroxide, trimer), MEKPO (Methyl ethyl ketone peroxide) are lower danger than that of TNT (Tri-nitro toluene), but still very high danger, and used as dilute solution in chemical. Hydroxylamine is much danger than most industrial explosives, such as TNT, ammonium nitrate.
