What is meant by "primary and secondary hazard" in hazardous materials?

The concept of "primary and secondary hazard" in hazardous materials refers to the classification of the risks associated with the material being handled. A primary hazard represents the main or most significant danger posed by the material. This is the immediate threat that needs to be addressed first to ensure safety. For example, if a material is highly flammable, its primary hazard is the risk of fire or explosion.

Secondary hazards, on the other hand, consist of additional risks that may not be as instantaneous or severe as the primary hazard but still warrant attention. These can include potential health effects, environmental impacts, or other risks that could arise from exposure to the primary hazard or from the material's properties. For instance, a chemical might be toxic as a secondary hazard, even if its primary danger is its flammability.

Understanding both hazards is crucial for proper handling, emergency response, and safety protocols, as addressing both ensures a comprehensive approach to managing risks associated with hazardous materials.