NFPA 704 Hazard Diamond Explained | Chemical Safety Rating System #159321 (License: Personal Use)

The image displays a standard NFPA 704 hazard identification diamond used in occupational safety to communicate chemical risks quickly. The red quadrant (top) indicates health hazard level 0 (minimal), blue (left) shows flammability level 3 (liquid or solid that can ignite under almost all ambient conditions), yellow (right) denotes reactivity level 2 (violently reacts with water or undergoes violent polymerization), and white (bottom) marks a special hazard-here “W” meaning water-reactive. This visual system helps emergency responders and workers assess dangers at a glance.

Commonly displayed on chemical containers, storage cabinets, and facility entrances in labs, manufacturing plants, and warehouses; used by safety officers, EHS professionals, and first responders to rapidly evaluate hazards during handling, transport, or emergencies.