![]() And, in another study, published in 2010 in the journal Environmental Health Perspectives, investigators found that people who swam in a chlorinated pool for 40 minutes had increased biomarkers (i.e., certain molecular indicators) related to cancer risk. For example, in a study published in 1992 in the American Journal of Public Health, researchers found that people who drank chlorinated water had a 21 percent higher risk of getting bladder cancer, and a 38 percent higher risk of getting rectal cancer, than people who drank non-chlorinated water. Previous research has linked drinking chlorinated water to an increased cancer risk. However, by rearranging the compound on the atomic level, chemists hope they can eventually find a version that is a potent pain reliever. Natives of the Colombian tropical rainforest used to rub the tips of their arrows on the skin of these " poison-dart frogs." John Daly, a scientist at the National Institutes of Health tried to isolate the compound, called epibatidine, but could not get enough of the substance (the frogs are endangered), and what he did synthesize had unwanted side effects. It can paralyze or even kill large animals, according to the American Chemistry Council. Those effects, however, remain debatable.Ĭhlorine is one of the atoms in a toxin that some South American frogs have in their skin. And that strong chlorine that you may smell when swimming at the public pool may actually be an indicator that additional chlorine is needed to balance the chemicals in the water.Ĭhlorine has caused quite a stir among researchers over the years because of certain harmful effects it may have on human health. According to the American Chemistry Council, the water in most swimming pools should contain two to four parts per million of chlorine. Swimming pools rely on chlorine to help keep them clean.In fact, one chlorine atom can destroy as many as 100,000 ozone molecules before it is removed from the stratosphere, according to the U.S. Chlorine destroys ozone, contributing to the process of ozone depletion.factory farms are often drenched in chlorine to get rid of fecal contamination. There may be some chlorine in the chicken you eat.Sodium chloride (salt) is the most common compound of chlorine and occurs in large quantities in the ocean. ![]() Chorine is the second-most-abundant halogen and the second-lightest halogen on Earth, after fluorine.When isolated as a free element, chlorine takes the form of a greenish-yellow gas, which is 2.5 times heavier than air and smells like bleach.Due to its toxic properties, chlorine was used as a chemical weapon during World War I, according to the Royal Society of Chemistry.Most chlorine is made via electrolysis of sodium chloride solutions - using an electric current to create a chemical reaction, according to the University of York. ![]() Other compounds include potassium chloride, which is used to prevent or treat low potassium levels in the blood, and magnesium chloride, which is used to prevent or treat magnesium deficiency. In fact, probably the most known form of a chlorine compound is sodium chloride, otherwise known as table salt. They are typically found as salts in minerals. None are found in nature in their elemental form, according to Purdue University. They are highly reactive elements when bonded with hydrogen, they produce acids. Their electron configurations are similar, with seven electrons in their outer shell. They are all in the second column from the right on the periodic table in Group 17. When used as a hydrogen substitute, chlorine can bring many desired properties in organic compounds, such as its disinfecting properties or its ability to form useful compounds and materials like PVC and synthetic rubber.Ĭhlorine belongs to the group of halogens - salt-forming elements - together with fluorine (F), bromine (Br), iodine (I) and astatine (At). An oxidizing agent has strong disinfecting and bleaching qualities. The element is also used in organic chemistry processes - for example, as an oxidizing agent and a substitution for hydrogen, according to the Los Alamos National Laboratory. Moreover, chlorine is used in the development and manufacturing of materials used in products that make vehicles lighter, from seat cushions and seat covers to tire cords and bumpers, according to the American Chemistry Council. It is used to sterilize drinking water and to disinfect swimming pools, and it is used in the manufacturing of a number of commonly used products, such as paper, textiles, medicines, paints and plastic, particularly PVC, according to the Royal Society of Chemistry. 17 on the Periodic Table of Elements, has multiple applications.
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