nfpa 704 placard description

HEALTH HAZARD

4 EXTREME - Highly toxic - May be fatal on short-term exposure. 3 SERIOUS - Toxic - Full protective suit and breathing apparatus should be worn. 2 MODERATE - Breathing apparatus and face mask must be worn. 1 SLIGHT - Breathing apparatus may be worn. 0 MINIMAL - No precautions necessary.

FLAMMABILITY HAZARD

4 EXTREME - Extremely flammable gas or liquid. Flash Point below 73°F. 3 SERIOUS - Flammable. Flash Point 73°F to 100°F. 2 MODERATE - Combustible. Requires moderate heating to ignite. Flash Point below 200°F. 1 SLIGHT - Slightly combustible. Requires strong heating to ignite. 0 MINIMAL - Will not burn under normal conditions.

SPECIFIC HAZARD

OXIDIZER OXY

ACID ACID

ALKALI ALK

CORROSIVE COR

Use NO WATER W
RADIATION ☽

INSTABILITY HAZARD

4 EXTREME - Explosive at room temperature. 3 SERIOUS - May detonate if shocked or heated under confinement or mixed with water. 2 MODERATE - Unstable. May react with water. 1 SLIGHT - May react if heated or mixed with water. 0 MINIMAL - Normally stable. Does not react with water.