Sodium stearate is the sodium salt of stearic acid. Sodium stearate has both hydrophilic and hydrophobic parts. These two parts force different chemical components to form micelles, with the hydrophilic part facing the outside and the hydrophobic part facing the inside of the chain.

This substance does not dissolve in cold water, but as the water temperature increases, its dissolution increases rapidly. For this reason, this chemical is used in the initial formulation of all types of grease removers and as the most common soap substance.

Pure sodium stearate is synthesized by the chemical reaction between stearic acid and sodium hydroxide. This chemical can also be produced through saponification or hydrolysis reaction between sodium hydroxide and triglyceride.

Molecular mass306.46 g/mol
Melting Point255 °C
SolubilitySoluble in water
AppearanceWhite solid


  • Rubber industries
  • Production of detergents
  • Plastic industries
  • Production of lubricants
  • Pharmaceutical industries
  • Food industries
  • Production of explosives
  • Plating industries
  • Surfactant


Sodium stearate is supplied in 25 kg polyethylene bags.

Chemical Formula

  • C18H35 NaO2

Other names

  • sodium soap
  • sodium octadecanoate

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