Bleaching powder chemical formula

Bleaching powder chemical formula

 Bleaching Powder 

Bleaching powder is calcium hypochlorite. it’s also called Hypochlorus acid calcium salt bleaching powder, calcium oxychloride or chloride of lime.  

Properties of Bleaching powder

  • Chemical formula of Bleaching powder  – Ca(ClO)
  • Molecular weight  of Bleaching powder  – 142.98 g/mol
  • Density                  of Bleaching powder  –  2.35 g/cm³ at 20 ⁰C
  • Melting point         of Bleaching powder  –  100 ⁰C
  • Boiling  point        of Bleaching powder  –  175 ⁰C
  • Solubility in water                                     –   21 g/100ml at 25 ⁰C
  • Bleaching powder is a white powder which gives a strong smell of chlorine.
  • Bleaching powder is soluble in cold water.
  • Bleaching powder reacts with dilute acid (H2So4) to produce chlorine.

CaOCl2    ➕   H2So ➝ CaSO4      ➕  Cl2     ➕    H2O   

Bleaching powder     sulfuric Acid       Calcium Sulfate     Chlorine          water        

Preparation of bleaching powder

Bleaching powder is prepared by passing chlorine gas over dry slaked lime.


   Ca(OH)2      ➕   Cl2         ➝   CaOCl2       ➕   H2O   
    Calcium Hydroxide         Chlorine             Bleaching powder          water        
    (Slaked lime)             

Uses of bleaching powder

  • Bleaching powder is used for the manufacture of Chloroform (CHCl3), making wool unsinkable, Oxidizing agent in many chemical industries, disinfecting drinking water supply. that’s for making drinking water free from germs.



  • it’s used for bleaching cotton, linen & other fiber in the textile industry and for bleaching wood pulp in the paper industry. it is also used for bleaching washed clothes in the laundry. 



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