Water chlorination is the process of adding chlorine or chlorine compounds such as sodium hypochlorite to water. This method is used to kill bacteria, viruses and other microbes in water. In particular, chlorination is used to prevent the spread of waterborne diseases such as cholera, dysentery, and typhoid.
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Sodium hypochlorite in the context of Bleach
Bleach is the generic name for any chemical product that is used industrially or domestically to remove color from (i.e. to whiten) fabric or fiber (in a process called bleaching) or to disinfect after cleaning. It often refers specifically to a dilute solution of sodium hypochlorite, also called "liquid bleach".
Many bleaches have broad-spectrum bactericidal properties, making them useful for disinfecting, sterilizing. Liquid bleach is one of the few compounds capable of fully annihilating DNA, making it commonplace for sanitizing laboratory equipment. They are used in swimming pool sanitation to control bacteria, viruses, and algae and in many places where sterile conditions are required. They are also used in many industrial processes, notably in the bleaching of wood pulp. Bleaches also have other minor uses, such as removing mildew, killing weeds, and increasing the longevity of cut flowers.