Which class includes toxic and infectious substances in the IATA DGR?

• A. Class 6.
• B. Class 2.
• C. Class 4.
• D. Class 9.

Answer: (A)

In the IATA Dangerous Goods Regulations, dangerous goods are organized into classes based on their hazard type. Toxic and infectious substances are grouped together under Class 6, which is specifically dedicated to these hazards. This class is further divided into two divisions: 6.1 for toxic substances and 6.2 for infectious substances. The other classes cover different hazards—Class 2 is for gases, Class 4 for flammable solids, and Class 9 for miscellaneous dangerous goods—none of which cover toxic or infectious materials. So the class that includes both toxic and infectious substances is Class 6.