NFPA 704 Hazard Diamond Explained | Chemical Safety Ratings #131637 (License: Personal Use)

The image displays a standard NFPA 704 hazard identification diamond, divided into four colored quadrants: blue (health hazard, rating 1), red (flammability, rating 3), yellow (instability/reactivity, rating 2), and white (special hazards, blank here). Each number corresponds to a severity level from 0 (minimal) to 4 (severe), helping first responders and workers quickly assess risks. The absence of a symbol in the white quadrant means no special hazards like oxidizers or water reactivity are present.

Used on chemical containers, storage areas, and safety data sheets to communicate immediate hazards; supports OSHA compliance and emergency planning by enabling rapid visual risk assessment.