Sodium Hypochlorite

Sodium hypochlorite

What Is sodium hypochlorite ?

Sodium hypochlorite (NaOCl) is a solution made from reacting chlorine with a sodium hydroxide solution. These two reactants are the major co-products from most chlor-alkali cells.

Maybe you ask about different of it and chlorine bleach; actually There are several types of chlorine bleach, the most commonly known one being liquid NaOCl.

Usage of NaOCI

NaOCI, commonly known as bleach, is most frequently used as a disinfecting agent. It fights germs even at very low concentrations and is excellent at removing stains and unpleasant odors.
It is a broad-spectrum disinfectant that is effective for the disinfection of viruses, bacteria, fungi, and mycobacterium. It can be used as a household cleaner, thanks to its distaining properties, and may also be an ingredient in laundry detergents and deodorizing products. However, it is NOT effective in the disinfection of bacterial spores and prions.

For usage of it  recommended dilution 1:100 dilution of 5% sodium hypochlorite is the usual recommendation. Use 1 part bleach to 99 parts cold tap water (1:100 dilution) for disinfection of surfaces.

Different type of sodium hypochlorite

  •  5% NaOCI
    It is a clear, slightly yellowish solution with a characteristic odor. It has a relative density of is 1,1 (5,5% watery solution). As a bleaching agent for domestic use it usually contains 5% hypochlorite.
  •  solution 10% NaOCI
    Hypochlorite 10% solution is used in healthcare facilities, in public facilities, in hospitality and hotel industries and in household, as efficient disinfectant and bleaching agent.
  • NaOCI 12.5%
    Hypochlorite 12.5% Solution is an industrial-grade chlorine-based liquid bleach that is colorless or light amber in appearance, with a chlorine odor. Bulk bleach is widely used for its disinfectant and bleaching properties.

Properties of NaClO


Sodium hypochlorite

Molecular Weight/ Molar Mass

74.44 g/mol


1.11 g/cm³

Boiling Point

101 °C

Melting Point

18 °C