How many hazard classes of dangerous goods are there?

How many hazard classes of dangerous goods are there?

• A. 9
• B. 7
• C. 12
• D. 15

Answer: (A)

Dangerous goods are organized into hazard classes to communicate what kind of danger they pose and how to handle them safely. There are nine hazard classes. They are explosives; gases; flammable liquids; flammable solids, water-reactive materials, and substances liable to spontaneous combustion; oxidizing substances and organic peroxides; toxic and infectious substances; radioactive materials; corrosive substances; and miscellaneous dangerous goods. The nine classes represent the standard framework used across transport regulations, even though there are many subcategories within each class. So the total number of main hazard classes is nine.

Dangerous goods are organized into hazard classes to communicate what kind of danger they pose and how to handle them safely. There are nine hazard classes. They are explosives; gases; flammable liquids; flammable solids, water-reactive materials, and substances liable to spontaneous combustion; oxidizing substances and organic peroxides; toxic and infectious substances; radioactive materials; corrosive substances; and miscellaneous dangerous goods. The nine classes represent the standard framework used across transport regulations, even though there are many subcategories within each class. So the total number of main hazard classes is nine.