ACGIH: TWA 2 mg/m3 OSHA: TWA 15 mg/m3; TWA 5 mg/m3 NIOSH: IDLH 1250 mg/m3; TWA 2.5 mg/m3
Stable. Reacts slowly with moist air and water. Dust may form an explosive or combustible mixture with air. Incompatible with organic acids, strong oxidizing agents, water, mineral acids.