What does "incompatible materials" mean in the context of TDG?

The term "incompatible materials" in the context of Transportation of Dangerous Goods refers to materials that may react dangerously if they come into contact with one another. This reaction can lead to dangerous situations such as fire, explosion, toxic gas release, or the creation of other hazardous conditions.

Understanding incompatible materials is crucial for ensuring safety during the transportation of dangerous goods. For example, certain chemicals may be stable on their own but can cause violent reactions when mixed with other substances. This classification helps in the development of regulations and guidelines for safe handling, storage, and transportation, thereby minimizing risks associated with transporting hazardous materials.

The other choices do not accurately capture the essence of what "incompatible materials" means in this context, as they either suggest safe interactions or imply a lack of risk, which does not apply to dangerous goods.