Unlike liquid Sodium Hypochlorite, it is in a granular form, which can be tabletised, stable on a long term basis when kept in cool dry conditions in a closed container.

　　Because it contains Calcium, the addition of Calcium Hypochlorite to soft pool water will add to the calcium hardness and help prevent corrosion.

　　Being unstabilised, it can be used where "chlorine lock" is a problem due to there being too much stabiliser (isocyanuric acid) in the water.