Chlorine is one of the most commonly manufactured chemicals in the United States. In gas form, chlorine is poisonous and was actually used during World War I as a choking agent, according to the U.S. Centers for Disease Control and Prevention. You can recognize chlorine gas by its pungent, bleach-like odor that sometimes hovers around indoor swimming pools.
Chlorine gas can be pressurized and cooled to change it into a liquid form, which is used to make countless industrial and household products including:
- Bleach (both household chlorine bleach and bleach used in the manufacture of paper and cloth)
Chlorine is also used for water treatment purposes to kill bacteria, so it’s not only likely in your drinking water, it’s in the water you use to shower and bathe with.