Chloride
Cl⁻
Chloride is a negatively charged ion of the element chlorine (Cl). It is a halogen, and is a part of the halide group of elements. In nature, chloride ions are found most commonly as a component of sodium chloride (table salt), and are essential for the functioning of human and animal bodies. Chloride ions play an important role in regulating the pH level of body fluids, as well as the balance of electrolytes in the body. Chloride ions are also used in a variety of industrial processes, including the production of PVC plastic, pesticides, and as a disinfectant. In analytical chemistry, chloride tests are commonly used to determine the concentration of chloride ions in a given sample, particularly in environmental and wastewater testing.
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