NFPA 704 Hazard Diamond Guide - Understanding Chemical Risk Symbols #131638 (License: Personal Use)

This image displays the standard NFPA 704 hazard identification system, a diamond-shaped placard divided into four colored sections: blue for health hazard, red for flammability, yellow for reactivity, and white for special hazards (here indicating water-reactive with a “W”). Each quadrant contains a number (0-4) or symbol to denote severity or type, enabling rapid risk assessment in emergencies. The outer Maltese cross shape is typical of fire department signage.

Used on chemical containers, storage areas, and facility entrances to alert emergency personnel and workers to potential dangers; matches user intent for safety training, regulatory compliance, or hazard communication reference.