When inhaled, chlorine gas reacts with moisture in the respiratory tract to form hydrochloric acid and hypochlorous acid. These reactive substances can cause severe irritation and damage to the mucous membranes, leading to symptoms such as coughing, chest pain, shortness of breath, and choking. In higher concentrations, chlorine gas can cause pulmonary edema, a life-threatening condition where fluid accumulates in the lungs.
