Sodium Hypochlorite

Sodium hypochlorite is a chemical compound with the formula NaClO. It is composed of a sodium cation (Na+) and a hypochlorite anion (ClO−); it may also be viewed as the sodium salt of hypochlorous acid. When dissolved in water it is commonly known as bleach or liquid bleach, and is frequently used as a disinfectant or a bleaching agent.




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Potassium hypochlorite was first produced in 1789 by Claude Louis Berthollet in his laboratory on the quay Javel in Paris, France, by passing chlorine gas through a solution of potash lye. The resulting liquid, known as “Eau de Javel” (“Javel water”), was a weak solution of potassium hypochlorite. Antoine Labarraque replaced potash lye by the cheaper soda lye, thus obtaining sodium hypochlorite (Eau de Labarraque).


Various methods have been used since to produce this but the modern method, the Hooker process, is the only one producing this in any bulk capacity.

Sodium Hypochlorite has many uses as can be seen above:-


In bleach cleaning products and to remove stains.
In Swimming pools as a disinfectant.
In Antibacterial sprays
To neutralise nerve agents
To reduce skin damage – using very low concentrations.

Sodium Hypochlorite although used in household bleach is not the only component.  There is often Sodium Hydroxide and Calcium Hypochlorite amongst others.  it must be remembered not to mix household cleaning products as some may contain hydrochloric acid. If these are mixed with bleach, it can react with sodium hypochlorite, and form toxic chlorine gas

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Posted on September 19, 2014, in Useful Information. Bookmark the permalink. Leave a comment.

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