Minimum Explosible Concentration (g/m3): Less than 100. Varies with particle size.
Extinguishing Media: Dry table salt. Type D fire extinguisher. DO NOT USE water, carbon dioxide or halocarbon extinguishing agent.
Special Firefighting Procedures: If metal fines become ignited it is advisable to allow the material to burnout. Fire can be controlled by smothering with dry table salt or using Type D dry-powder fire extinguisher material. Wear reflective heat-resistant suit.
Unusual Fire & Explosion Hazard: Do not spray water on burning zirconium. Carbon dioxide is not effective in extinguishing burning zirconium.