68o F. It will burn in an atmosphere of carbon dioxide. Zirconium powder can auto ignite in air when dry. It is extremely sensitive to shock, heat, friction and static electricity. Settled zirconium may form a hard cake, reslurry by rolling the shipping container on a ball-mill type roller for a minimum of 30 minutes. Do not attempt to remove zirconium if it has settled in the container.
Friction can cause ignition if water content of the material is low.
Routine inspection of product containers for possible leakage or drying is highly recommended. May be harmful by inhalation, ingestion, or skin absorption. Causes eye and skin irritation. Material is irritating to mucous membranes and upper respiratory tract. To the best of our knowledge, the chemical, physical, and toxicological properties have not been thoroughly investigated.