Toxic materials and infectious substances are designated under which Class?

• A. Class 7
• B. Class 8
• C. Class 9
• D. Class 6

Answer: (D)

In air-transport safety, dangerous goods are grouped by hazard, and the label for substances that are toxic or capable of spreading infection is the class focused on those specific dangers. This class has two subcategories: toxic substances and infectious substances, each with its own handling, packaging, and labeling requirements. That focus on both chemical toxicity and biological infection is what makes this the correct designation for toxic materials and infectious substances. The other classes address different hazards—radioactive materials, corrosives, and miscellaneous dangerous substances—so they don’t apply to toxic or infectious shipments. Therefore, the correct designation is the class that explicitly covers toxic and infectious substances.