Wording: NFPA Rating Explanation Guide Rating Number Health Hazard Flammability Hazard Instability Hazard Rating Symbol Special Hazard 4 Can be lethal Will vaporize and readily burn at normal temperatures May explode at normal temperatures and pressures 3 Can cause serious or permanent injury Can be ignited under almost all ambient temperature May explode at high temperature or shock 2 Can cause temporary incapacitation or residual injury Must be heated or high ambient temperature to burn Violent chemical change at high temperatures or pressures 1 Can cause significant irritation Must be preheated before ignition can occur Normally stable. High temperatures make unstable 0 No hazard Will not burn Stable OX Oxidizing SA Simple asphyxiants W Reacts violently or explosively with water This chart for reference only - for complete specifications consult the NFPA 704 Standard
NFPA 704 rating guide sign explains hazard ratings and symbols
Corners have 0.20-in. mounting holes for easy installation
Resists UV, chemicals, abrasion and moisture. Use indoors or out
Available Materials: Aluminum|Plastic|Label (Sticker)|Magnetic
