What does the NFPA Diamond white square represent?

The NFPA Diamond is a visual representation used to convey the hazards associated with materials. The white square is specifically designated for "Special hazards," which includes any unique risks not covered by the other three categories in the diamond. This could encompass hazards such as radiation, corrosive materials, or other specific dangers that might require additional caution or handling procedures.

Understanding this aspect of the NFPA Diamond is crucial for safety in environments where hazardous materials are present. Proper identification of special hazards helps ensure that individuals working with or near these materials are aware of and can take appropriate precautions.