WHMIS Hazard Rating - USA

Flammability

Flash points

• 4 = < 70° F = Very High
• 3 = < 100° F = High
• 2 = < 200° F = Moderate
• 1 = > 200° F = Slight
• 0 = Will not burn = Insignificant

Reactivity

• 4 = May detonate
• 3 = Shock/heat may detonate
• 2 = Violent chemical change
• 1 = Unstable if heated
• 0 = Stable

Health

• 4 = Deadly
• 3 = Extreme danger
• 2 = Hazardous
• 1 = Slightly hazardous
• 0 = Normal material

Specific Hazard

• Oxidizer
• Corrosive
• Use NO WATER
• Radiation

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