Which part of the NFPA 704 diamond refers to special hazards?

The NFPA 704 diamond is a standardized labeling system used to identify the hazards associated with materials. In this system, the special hazards section refers specifically to unique hazards that are not covered by the standard numerical categories of health, flammability, and reactivity.

This section is usually represented by a white color in the diamond and can include symbols or letters that indicate dangers such as "OX" for oxidizers, "ACID" for materials that are acidic, or a symbol indicating that the material should not come into contact with water. This specialized information is crucial for first responders and fire investigators, as it provides immediate guidance on how to handle the substance safely during an emergency.

Therefore, identifying the special hazards correctly as part of the NFPA 704 diamond reflects an understanding of how to approach incidents involving hazardous materials effectively.