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NFPA Chemical Hazard Label

NFPA Rating - The National Fire Protection Association (NFPA) has developed a standard system (ANSI/NFPA 704) for indicating the health, flammability, and reactivity hazards of chemicals. In addition, a special precaution symbol may be used where necessary.

This system of identifying hazards associated with various materials was developed primarily for fire protection and emergency personnel but can be useful to anyone who needs to handle potentially hazardous material. As stated in NFPA 704, "This standard provides a simple system of readily recognizable and easily understood markings, which will give at a glance a general idea of the inherent hazards of any material and the order of severity of these hazards as they relate to fire prevention, exposure, and control".

NFPA Label NFPA Special Symbols

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General Rating Summary

Health (Blue)

4 Danger May be fatal on short exposure. Specialized protective equipment required
3 Warning Corrosive or toxic. Avoid skin contact or inhalation
2 Warning May be harmful if inhaled or absorbed
1 Caution May be irritating
0 No unusual hazard

Flammability (Red)

4 Danger Flammable gas or extremely flammable liquid
3 Warning Flammable liquid flash point below 100 F
2 Caution Combustible liquid flash point of 100 to 200 F
1 Combustible if heated
0 Not combustible

Reactivity (Yellow)

4 Danger Explosive material at room temperature
3 Danger May be explosive if shocked, heated under confinement or mixed with water
2 Warning Unstable or may react violently if mixed with water
1 Caution May react if heated or mixed with water but not violently
0 Stable Not reactive when mixed with water

Special Notice Key (White)

W Water Reactive
OX Oxidizing Agent


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Special Precaution Symbols

Flammable! Flammable!

Explosive! Explosive!

Corrosive! Corrosive!

Poison! Poison!

Radioactive! Radioactive!

Compressed Gas! Compressed Gas!