Dangerous Goods Classes

Class 1: Explosive substances and articles used to produce explosions or pyrotechnic effect (with 6 divisions)
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Class 2.1: Gases (flammable)
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Class 2.2: Gases (non-flammable)
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Class 2.3: Gases (poisonous)
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Class 3: Flammable Liquids
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Class 4.1: Flammable Solids
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Class 4.2: Spontaneously Combustible Substances
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Class 4.3: Water Reactive Materials
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Class 5.1: Oxidizers
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Class 5.2: Organic Peroxides
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Class 6.1: Poisonous Materials
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Class 6.2: Infectious Substances
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Class 7: Radioactive Materials
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Class 8: Corrosive Materials
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Class 9: Miscellaneous Hazardous Materials