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Gas duster, also known as canned air or compressed air, is a product used for cleaning electronic equipment and other sensitive devices that cannot be cleaned using water. Despite the name "canned air", the cans actually contain gases that are much easier to compress into liquids, such as 1,1-difluoroethane, 1,1,1-trifluoroethane, or 1,1,1,2-tetrafluoroethane. Hydrocarbons, like butane, were often used in the past, but their flammable nature forced manufacturers to use fluorocarbons. == Safety == Since gas dusters are one of the many inhalants that can be easily abused,〔http://www.snopes.com/medical/toxins/dustoff.asp〕 many manufacturers have added a bittering agent to deter people from inhaling the product. Because of the generic name "canned air", it was mistakenly believed that the can only contains normal air or contains a less harmful substance such as nitrous oxide. However, the gases actually used are denser than air, and inhaling can lead to paralysis, serious injury or death. Though not extremely flammable in gaseous form, many dusters use a fluorocarbon that can burn under some conditions. As such, there is also a warning label present on some gas dusters. When inverted to spray liquid, the boiling fluorocarbon aerosol is easily ignitable, producing a very large blast of flame and extremely toxic byproducts such as hydrogen fluoride and carbonyl fluoride as a combustion product. Fluorocarbons, although they replaced the older set of more flammable hydrocarbons, can still combust relatively easily, e.g., by holding a source of fire (such as a match or lighter) to the escaping fluid. They do, however, have a lower chance of exploding in a closed container by means of spontaneous combustion. The liquid, when released from the can, boils at a very low temperature, rapidly cooling any surface it touches. This can cause frostbite on contact with skin. As the can gets very cold during extended use, holding the can itself can result in frostbite. Since gas dusters are often contained in pressure vessels, they are considered explosively volatile. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Gas duster」の詳細全文を読む スポンサード リンク
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