Portal:Hazardous Materials/Selected Article

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Selected Hazardous Materials Articles
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Explosives are any substance or article, including a device, which is designed to function by explosion or which, by chemical reaction within itself is able to function in a similar manner even if not designed to function by explosion (unless the article is otherwise classed under a provision of 49CFR).
Class 1.1: ExplosivesClass 1.2: ExplosivesClass 1.3: ExplosivesClass 1.4: ExplosivesClass 1.5: Blasting AgentsClass 1.6: Explosives
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The HAZMAT Class 2 includes all gases which are compressed and stored for transportation. Class 2 has three divisions: Flammable (also called combustible), Non-Flammable/Non-Poisonous, and Poisonous.
Class 2.1: Flammable GasClass 2.2: Nonflammable GasClass 2.2: OxygenClass 2.3: Poisonous GasClass 2.3: Inhalation Hazard
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A flammable liquid is a liquid with flash point of not more than 60.5°C (141°F), or any material in a liquid phase with a flash point at or above 37.8°C (100°F).
Class 3: Flammable LiquidsClass 3: CombustibleClass 3: Fuel OilClass 3: Gasoline
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Flammable solids are any materials in the solid phase of matter that can readily undergo combustion in the presence of a source of ignition under standard circumstances, i.e. without:
  • Artificially changing variables such as pressure or density; or
  • Adding accelerants.

Class 4.1: Flammable SolidsClass 4.2: Spontaneously Combustible SolidsClass 4.3: Dangerous when Wet
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An oxidizer is a chemical that readily yields oxygen in reactions, thereby causing or enhancing combustion.
Class 5.1: Oxidizing AgentClass 5.2: Organic Peroxide Oxidizing Agent
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Poisonous material is a material, other than a gas, known to be so toxic to humans that it presents a health hazard during transportation.
Class 6.1: PoisonClass 6.2: BiohazardClass 6: Inhalation HazardClass 6: Poison Gas IIIClass 6: Toxic
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Radioactive substances are materials that emit radiation. Category 7 radioactive substances include any quantity of packages bearing the RADIOACTIVE YELLOW III label (LSA-III). Some radioactive materials in "exclusive use" with low specific activity radioactive materials will not bear the label, however, the RADIOACTIVE placard is required.
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A corrosive material is a liquid or solid that causes full thickness destruction of human skin at the site of contact within a specified period of time. A liquid that has a severe corrosion rate on steel or aluminum based on the criteria in 49CFR 173.137(c)(2) is also a corrosive material.
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The miscellaneous hazardous materials category encompasses all hazardous materials that do not fit one of the definitions listed in Class 1 through Class 8.
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