The vapour is heavier than air. The substance decomposes on contact with water producing corrosive propionic acid. Reacts violently with acids, bases and oxidants causing fire and explosion hazard. The substance is corrosive to the eyes, the skin and the respiratory tract. The effects may be delayed.
Medical observation is indicated.
TLV not established. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort.