| Class | Description | Symbol Image |
| Class 6 - Toxic and infectious Substances | |
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| SubClass 6.1 - Toxic substances | Known to be toxic to humans so as to afford a hazard to health during transportation or is presumed to be toxic to humans because it falls within a toxic category when tested on laboratory animals.
an irritating material such as tear gas that causes extreme irritation, especially in confined spaces. |
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| SubClass 6.2 - Infectious substances | Infectious substances are substances which are known or are reasonably expected to contain pathogens. Pathogens are defined as micro-organisms (including bacteria, viruses, rickettsiae, parasites, fungi) and other agents such as prions, which can cause disease in humans or animals. |
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| Class 7 - Radioactive Substances | 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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| Class 8 - Corrosives | For the purpose of this subchapter "corrosive materials" (Class 8) means 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 is also a corrosive material. |
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| Class 9 - Miscellaneous dangerous substances and articles | A material which presents a hazard during transportation but which does not meet the definition of any other hazard class. This class includes:
1. Any material which has an anesthetic, noxious or other similar property which could cause extreme annoyance or discomfort to a flight crew member so as to prevent the correct performance of assigned duties; or
2. Any material for an elevated temperature material, a hazardous substance, a hazardous waste, or a marine pollutant. |
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