Chlorine - Cl2

Find here the essential information on chlorine - or dichlorine - (Cl2): characteristics, effects on health, detection devices & systems (chlorine gas detector) and proper respiratory protective equipment (gas mask or powered air purifying respirator with B gas filter).

Chlorine properties (Cl2)

Historically known for being used during the First World War as a chemical weapon (mustard gas), chlorine (Cl2) is widely used for its disinfectant properties as a biocide (to remove bacteria) during the water purification process. It is also used in other sectors like the chemical industry (production of herbicide and insecticide), textile and paper industries (as a bleaching agent).

CAS TWA (8 hours) STEL (15 minutes) LEL IP Density / Air Filter / Air
7782-50-5 - 0.5 ppm - 11.48 eV 2.49 B

Chlorine effects on health

Chlorine (Cl2) is a yellow-green gas with a particularly pungent and suffocating smell. This extremely toxic gas (R23) is irritant to the skin (R38), eyes (R36) and respiratory system (R37). As it particularly reacts with water, it may form hydrochloric acid (HCl) or hypochlorous acid (HOCl) that are extremely harmful to human health and environment.


Chlorine gas exposure hazards and health effects Cl2

Chlorine effects on health (Cl2)

Chlorine gas detector

Chlorine respiratory protection (Cl2)