Class 9 includes which type of materials?

Class 9 materials encompass a diverse range of substances that do not neatly fit into other hazard classes but still pose some level of risk during transportation. These include various types of regulated materials, such as lithium batteries and dry ice. Lithium batteries, for instance, can be hazardous due to their potential for overheating and releasing flammable gases if damaged or improperly handled. Dry ice, while not directly hazardous in the same manner, requires specific handling and packaging due to its carbon dioxide emissions and associated risks such as suffocation in poorly ventilated areas.

This classification is vital for ensuring proper handling and compliance during transportation, as these materials, though not always considered hazardous in traditional categories, still require oversight to prevent any incidents that could arise from their transport and use.