what is available chlorine
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Percent active chlorine is a unit of concentration used for hypochlorite-based bleaches. One gram of a 100% active chlorine bleach has the quantitative bleaching capacity as one gram of free chlorine.
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the amount of free chlorine that a substance (such as bleaching powder) yields when treated with an acid in the presence of a chloride (such as sodium chloride or calcium chloride), one atom of chlorine in a hypochlorite being thus computed as equivalent to a molecule of elemental chlorine.
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