Sodium Hydroxide
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Sodium Hydroxide has a history dating back as far as Ancient Egypt when archaeological evidence has shown that it was used in early soap making processes. Today, Sodium Hydroxide still plays a major part in soap-making world-wide but it also has many other uses.
Sodium Hydroxide, Lye, Caustic or Caustic Soda, as it is frequently known, has a chemical formulation of NaOH. Present day uses include paper making, oil drilling and the production of Aluminium. Sodium Hydroxide plays a major part in food production, as it is used in fruit and vegetable preparation, the processing of cocoa, the thickening of ice-cream and also in cooking.
Sodium Hydroxide is also widely used in cleaning processes world-wide, both on a domestic and industrial scale. Drain cleaners often comprise a combination of Sodium Hydroxide mixed with other chemicals which generate heat when added to water. This generation of heat is known as 'extothermic' and produces a substance which can easily dissolve fats, grease, oil, protein-based materials and hair.
There are a number of methods of producing Sodium Hydroxide and further explanations of these various methods can be found on the relevant pages of this website. They incluce The Castner-Kellner or Mercury Cell Process method, the Diaphragm Cell process, the Membrane Cell process and Nelsons process.
Strict legislation governs the packaging, labelling and transport of Sodium Hydroxide which is classified as 'Corrosive' and further information on these aspects can be found on the relevant web pages of this site.
It is essential that the potential hazards of Sodium Hydroxide, Lye, Caustic, Caustic Soda or NaOH are fully understood before handling or working with this substance. Sodium Hydroxide is a 'Corrosive' substance and can cause serious burns to eyes, skin and internal organs, with a risk of blindness and permanent tissue damage. Personal Protective Equipment (PPE) must always be worn when handling the product.
A further consideration is that Sodium Hydroxide hazards are not always immediately apparent with regard to the extent of burns; skin contact may result in 'itching' rather than the pain normally associated with a burn. However, the destruction of skin tissue tends to be deeper with Sodium Hydroxide and it is essential that the relevant web page concerning its hazards is fully read and understood before using this product.
In its solid form, Sodium Hydroxide tends to be sold as pellets or flake and is highly 'Corrosive.'
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