Calcium Hypochlorite Granules - Shock Chlorine 65%

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Shock Chlorine Granules 65%

Technical grade

Calcium hypochlorite is a powder chemical with the formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent (bleaching powder). This chemical is considered to be relatively stable and has greater available chlorine (65%) than sodium hypochlorite (liquid bleach).

Uses for Calcium Hypochlorite


Calcium hypochlorite is used for the disinfection of drinking water or swimming pool water. For use in outdoor swimming pools, calcium hypochlorite can be used as a sanitizer in combination with a cyanuric acid stabilizer. The stabilizer will reduce the loss of chlorine because of UV radiation. Calcium does make the water hard and tends to clog up some filters. However, some types of calcium hypochlorite do contain anti-scaling agents in order to prevent clogging up of pipes/filters. This grade of calcium hypochlorite can also be used in hard waters. The main advantage of calcium hypochlorite is that it is unstabilised unlike chlorinated isocyanurates such as sodium dichloroisocy­anurate or trichloroisocy­anuric acid. Latter products do contain cyanuric acid. If the level of cyanuric acid becomes too high, it will influence the performance of the chlorine.

Pools running on calcium hypochlorite should have a chlorine level of 1-2 ppm (mg/L).

Calcium hypochlorite is also used for bleaching cotton and linen and is used in the manufacture of chloroform.

For whitening in laundry one normally uses approx 200mls of 5% bleach per load. As the calcium hypochlorite is 65% chlorine then you will need around 15g of the calcium hypochlorite per wash. alternatively you can make a 5% solution by adding 77g of calcium hypochlorite to 1 litre of water and use 200mls of this solution.

Other uses are:

  • As a bathroom cleaner
  • For Cleaning secondhand items
  • Adds glow to glass dishware
  • As a Household disinfectant spray
  • It remove moss and algae from paths, patios and driveways
  • Use to sanitize garden tools
  • Kills weeds in walkways
  • Preserves and keeps cut flowers fresh
  • Can be used to Clean garden furniture,

Properties of calcium hypochlorite

  • Other names: Hypochlorous acid, calcium salt / Bleaching powder / Calcium Oxychloride
  • CAS No: 7778-54-3
  • EC No: 231-908-7
  • UN No: 1748
  • Appearance: white or grey/white powder with odour of chlorine
  • Molar Mass: 142.98 g/mol
  • Density: 2.35 g/cm3
  • Melting Point: 100oC

Health & Safety:

CLASS C: Oxidizing material. CLASS E: Corrosive solid.

R22- Harmful if swallowed. R38- Irritating to skin. R41- Risk of serious damage to eyes.


PLEASE NOTE: This product is not for human or animal consumption.


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