Which of the following is NOT an example of Class 9 material?

Which of the following is NOT an example of Class 9 material?

• A. Acids such as sulfuric acid
• B. Lithium-ion batteries
• C. Dry ice
• D. Auto-inflating devices

Answer: (A)

Class 9 covers miscellaneous dangerous goods—items that don’t fit neatly into the other eight classes. This question tests your ability to classify common hazardous materials into their proper classes. The corrosive acid listed is a Class 8 material, not Class 9, because corrosives are defined as Class 8. The other items are typical Class 9 examples: lithium-ion batteries carry a significant fire risk; dry ice is designated as Class 9 because it sublimates to carbon dioxide gas and can displace oxygen; auto-inflating devices contain gas-generating components that can present pressure or release hazards, falling under Class 9. Recognizing these distinctions helps responders anticipate hazards, choose appropriate PPE, and follow safety procedures during containment and transport. Therefore, sulfuric acid is not Class 9.

Class 9 covers miscellaneous dangerous goods—items that don’t fit neatly into the other eight classes. This question tests your ability to classify common hazardous materials into their proper classes. The corrosive acid listed is a Class 8 material, not Class 9, because corrosives are defined as Class 8. The other items are typical Class 9 examples: lithium-ion batteries carry a significant fire risk; dry ice is designated as Class 9 because it sublimates to carbon dioxide gas and can displace oxygen; auto-inflating devices contain gas-generating components that can present pressure or release hazards, falling under Class 9. Recognizing these distinctions helps responders anticipate hazards, choose appropriate PPE, and follow safety procedures during containment and transport. Therefore, sulfuric acid is not Class 9.