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General
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Calcium hypochlorite is a chemical compound with formula Ca(ClO)2.
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It is
widely used for water treatment and as a bleaching agent (bleaching
powder).
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Bleaching powder is actually a mixture of calcium hypochlorite Ca(ClO)2
and the basic chloride CaCl2, Ca(OH)2, H2O with some slaked lime,
Ca(OH)2.
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It is
a yellow white solid which has a strong smell of chlorine. Calcium
hypochlorite is not highly soluble in water.
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It is
made by bubbling chlorine gas through a solution of calcium hydroxide.
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Calcium hypochlorite is not flammable, but it acts as an oxidizer with
combustible material and may react explosively with ammonia, amines, or
organic sulfides.
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Calcium hypochlorite should be stored in a dry, well ventilated area at
a temperature below 120 °F (50 °C) separated from acids, ammonia,
amines, and other chlorinating or oxidizing agents.
Uses
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Calcium hypochlorite is the main ingredient in swimming pool chlorine
tablets.
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Calcium hypochlorite is one of the best disinfectants known, killing
bacteria, yeasts, fungus, spores, even viruses.
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Calcium hypochlorite is used to disinfect water supplies and swimming
pools more than its sodium cousin sodium hypochlorite (household
bleach), because it can be sold as a solid.
Market
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Calcium hypochlorite is projected to grow at a modest 2 percent annual
rate, in line with pool starts which, in turn, hinge on the weather and
the health of the general economy.
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Calcium hypochlorite is being increasingly used in less developed
regions of the world for potable water treatment.
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