The substance decomposes on heating producing toxic and corrosive fumes including hydrogen chloride and chloroform. The solution in water is a strong acid, it reacts violently with bases and is corrosive to many metals. The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. The effects may be delayed.
Medical observation is indicated.
The substance can be absorbed into the body by inhalation of its vapour and by ingestion. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort.