Class 9 on hazmat classification refers to which category?

• A. Gases under pressure
• B. Corrosive liquids
• C. Miscellaneous hazardous materials
• D. Flammable solids

Answer: (C)

In hazmat classification, there is a catch-all category for hazards that don’t fit neatly into the other classes. Class 9 is that miscellaneous dangerous goods group.

This is the best answer because it describes a broad category used for a variety of dangerous items that aren’t covered by the more specific classes (like gases under pressure for Class 2, corrosive liquids for Class 8, or flammable solids for Class 4). So, Class 9 is essentially the “miscellaneous” category for hazardous materials.

Examples that often fall into this category include things like dry ice, lithium batteries, environmentally hazardous substances, and certain medical or clinical wastes.