A colorless gas with a pungent irritating odor. Corrosive. Heavier than air. Prolonged exposure to fire or intense heat may result in the violent rupture and rocketing of the container. Long-term exposure to low concentrations or short-term exposure to high concentrations can result in adverse health effects from inhalation. Used to make other chemicals and as a catalyst in the manufacture of chemicals.
Rate of onset: Immediate
Persistence: Minutes to hours
Odor threshold: 2 ppm
Source/use/other hazard: Chemical manufacturing industry; very corrosive.