What is an important characteristic of materials that are classified as 'not' potentially explosive?

The characteristic of materials classified as 'not' potentially explosive is that they have never contained munitions. This means that these materials do not have a history of being associated with explosive materials or devices, which greatly reduces the risk of explosion. When handling or transporting hazardous materials, it is critical to understand their properties to assess safety and compliance with regulations. Materials that have never housed munitions are unlikely to pose a risk of explosion, thereby allowing them to be managed with different safety protocols compared to those that are explosive or have been contaminated with explosive substances.

In contrast, options indicating that the materials are contaminated with explosives, predominantly explosive by nature, or manufactured from explosive compounds directly suggest the presence of hazards and risks related to explosions. These characteristics would classify such materials as potentially explosive, thereby highlighting the importance of understanding the context of materials in safety compliance.