Standard Fire Symbol
National Fire Protection Association (NFPA)
The NFPA uses a symbol system designed as a diamond-shaped label containing four differently colored squares. A number (0 - 4) or an abbreviation is added to each square indicating the order of hazard severity. The higher the number, the greater the hazard.
Red Background
Flammability
- 4 - flash point < 73 oF
- 3 - flash point < 100 oF
- 2 - flash point
> 100 oF < 200 oF
- 1 - flash point > 200 oF
- 0 - will not burn
Yellow Background
Reactivity
- 4 - explosive at room temp
- 3 - shock and heat may detonate
- 2 - violent reaction with water
- 1 - unstable if heated, not violent
- 0 - not reactive with water
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Blue Background
Health Hazard
- 4 - deadly
- 3 - extreme danger
- 2 - hazardous
- 1 - slightly hazardous
- 0 - normal material
White Background
Specific Hazard
- oxidizer OX
- acid ACID
- alkali ALK
- corrosive CORR
- use NO WATER
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Page last modified October 27, 2006
