There are how many different DOT hazard classes?

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The U.S. Department of Transportation (DOT) has established 11 distinct hazard classes to categorize hazardous materials for transportation. Each class is defined based on the specific characteristics of the materials and the potential risks they pose during transport.

These classes range from explosives and gases to flammable liquids, solids, corrosive materials, and others, each with its own set of regulations and safety guidelines. Understanding these classes is essential for ensuring that hazardous materials are handled, stored, and transported in compliance with safety standards to mitigate risks to humans and the environment.

The other options refer to a different number of classes, which does not align with the established classification system defined by the DOT. Thus, the answer correctly reflects the current standards in transportation safety practices.