Accelerant
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An accelerant is any substance or mixture that "accelerates" the development of fire. Accelerants are often used to commit arson, and some accelerants may cause an explosion.
An accelerant (or accelerator) is any substance that increases the rate of a chemical reaction, such as oxidation or the curing of an adhesive. Conversely, a decelerant (or retarder) inhibits the rate of a chemical reaction. A fire is an exothermic oxidation reaction that when accelerated produces more heat, consumes the reactants more quickly, burns at a higher temperature, and increases the spread of the fire. Some fire investigators use the term "accelerant" to mean any substance that initiates and promotes a fire implying no intent or use.
Presence of accelerants on the scene is commonly investigated when arson is suspected. Specially trained dogs are used, together with sensitive analytical instruments, eg. GC-MS for forensic chemistry analysis of the samples from the fire remains. Most common accelerants are hydrocarbon-based fuels and household chemicals: gasoline, diesel fuel, kerosene, turpentine, butane, and various other flammable solvents.
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