Calcium Hypochlorite Solution

Calcium hypochlorite solution is an aqueous preparation of Ca(ClO)₂, typically 5–15% active chlorine equivalent, used as a liquid disinfectant and bleach with enhanced stability over sodium hypochlorite in certain conditions.​

Composition and properties

It contains dissolved calcium hypochlorite (often stabilized with lime or silicates), releasing hypochlorous acid (HOCl) in water for biocidal action; pH is alkaline (10–12), less stable than solid form but easier to dose, with density ~1.1–1.2 g/mL and chlorine odor.​

Preparation

Produced by dissolving granular calcium hypochlorite in water under controlled conditions to avoid decomposition, or via electrolysis/chlorination of calcium hydroxide solutions; commercial solutions are filtered and buffered.​

Main uses

Applied in water treatment (swimming pools, potable water), sanitation, laundry bleaching, and food processing; preferred where calcium addition is beneficial, though it increases water hardness unlike NaOCl.