NFPA’s Hazard Diamond

The National Fire Protection Association (NFPA) hazard identification system uses a color-coded diamond to represent four different hazards.  The different colors represent three different types of hazard that may be associated with chemicals:

Blue  indicates health hazard.

Red  indicates flammability.

Yellow  indicates reactivity.

White represents other hazards such as if a chemical reacts violently with water ( ) or is an oxidizer ( ).

The numbers in the blue, red and yellow diamonds are used to indicate the severity of the hazard for that category:

0 = no or minimal hazard 1 = slight hazard 2 = moderate hazard 3 = serious hazard 4 = extreme hazard

NFPA Hazard Rating Information for Common Chemicals

 

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