Behaviour in case of a chemical accident


A yellowish green corrosive gas that is heavier than air and has a sharp, irritating scent.


Toxic chemical concentration in air.

Health effects

Extremely irritating to the eyes and respiratory system. Causes tearing, irritation of the eyes and throat, coughing, nausea, vomiting, headache, dizziness, and difficulties breathing. In moist air, it also irritates the skin. Possible lung oedema and death at higher concentrations.


If you are outside, move perpendicular to the direction of the wind outside of the danger zone. Hide in confined spaces. If you are inside, close all doors, windows, and ventilation openings. Cover the airway, with a damp cloth if possible. Avoid staying in basements – as the gas is heavier than air, the gas cloud moves on the ground and can accumulate in low places. If possible, go to the upper floors.

First aid

Move the injured person to an uncontaminated area with fresh air, remove contaminated clothing, flush the skin and eyes with running water for at least 15 minutes. In case of breathing difficulties, administer oxygen. Ensure peace and warmth. As the symptoms may appear later, the injured person will definitely need to be hospitalised!