Define "reactive substances" in the context of Dangerous Goods.

• A. Materials that are inert during transport
• B. Substances that can undergo a dangerous chemical reaction
• C. Only those that explode upon impact
• D. Goods that are safe to mix with water

Answer: (B)

Reactive substances are defined as materials that can undergo a dangerous chemical reaction. This can include a range of reactions, such as those that are exothermic (release heat) or result in the generation of gas, which can lead to pressure build-up and potential explosions. Reactive substances can interact with other materials, sometimes in unpredictable ways, leading to hazardous situations during transport, storage, or handling.

This definition is important in the context of dangerous goods because it emphasizes the potential risks associated with these substances, necessitating specific handling, packaging, and transport protocols to ensure safety. Understanding the behavior of reactive substances helps in evaluating their risks and implementing appropriate safety measures.