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National Fire Protection Association (NFPA) Code

The four-color diamond has red, blue, yellow and white quadrants that contain a code number (for the first three) or a code letter or symbol (in the white quadrant) corresponding to the different hazard types, fire, health, reactivity and specific. The numeric code ranges from 0 (the least dangerous) to 4 (the most dangerous). The white code has seven possible variants.

Fire Hazard (RED)

0 - Will Not Burn
1 - Flash Point > 200 degrees F
2 - Flash Point < 200 degrees F
3 - Flash Point < 100 degrees F
4 - Flash Point < 73 degrees F


Health Hazard (BLUE)

0 - Normal Material
1 - Slightly Hazardous
2 - Hazardous
3 - Extreme Danger
4 - Deadly


Reactivity Hazard (YELLOW)

0 - Stable
1 - Unstable If Heated
2 - Violent Chemical Change
3 - Shock and Heat May Detonate
4 - May Detonate


Specific Hazard (WHITE)

Acid
Alkali
Corrosive
Oxidizer
Polymerization
Radioactive
Use No Water




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