Question

Describe the 9 US DOT Hazmat Classes?

Answer 1

The nine U.S. DOT Hazmat Classes categorize hazardous materials by the type of danger they present, including explosives, gases, flammable liquids, and more, ensuring safe transport and handling.

Step-by-step explanation:

The correct answer is option U.S. DOT Hazmat Classes, which are used to classify hazardous materials during transport under the United States Department of Transportation regulations.

These classes define the type of hazard each hazardous material presents, aiding in proper handling and emergency response. Here is a concise description of each of the nine classes:

1. Class 1: Explosives - materials that can detonate or explode.
2. Class 2: Gases - which are divided into flammable gases, non-flammable gases, and toxic gases.
3. Class 3: Flammable Liquids - with a flash point of not more than 60°C (140°F).
4. Class 4: Flammable Solids - subdivided into flammable solids, spontaneously combustible materials, and materials that are dangerous when wet.
5. Class 5: Oxidizing Substances and Organic Peroxides - substances that can release oxygen to support the combustion of other materials and organic peroxides which can be thermally unstable.
6. Class 6: Toxic and Infectious Substances - materials that are liable to cause death or injury if inhaled, swallowed, or by skin contact; and infectious substances containing pathogens.
7. Class 7: Radioactive Materials - any material containing radionuclides where both the activity concentration and the total activity exceed certain predefined values.
8. Class 8: Corrosives - substances that can cause severe damage to living tissue or other materials on contact.
9. Class 9: Miscellaneous Dangerous Goods - materials and articles that pose a risk during transport which do not fall into other classes.

These classifications ensure the safe transportation and handling of hazardous materials and provide guidance for emergency response in case of incidents.