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HELM is represented with branches and sales offices in more than 30 countries.
Caustic Soda Lye

Also known under the product name:

  • Sodium Hydroxide
  • NaOH

CAS-Nr.: 1310-73-2
EINECS-Nr.: 215-185-5


Caustic Soda Lye

Caustic soda lye is used in many and various industries, such as paper, textiles and nutrition as well as in the production of soaps, detergents, cleansing agents, aluminium, paints and in the pharmaceuticals sector.

Yves-Florian Wolf

Executive Manager

Tel +49 40 2375-1210

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Caustic soda lye is sodium hydroxide dissolved in water and is produced by chlor-alkali electrolysis from salt (sodium chloride).

Examples of applications

In the chemicals industry, caustic soda lye is one of the most commonly traded lyes encountered on a daily basis. Caustic soda lye is used in the paper industry to remove lignin, for example, and to clean bottles, pipework, tanks, etc. It is also found in household products such as paint strippers and even in soaps. In addition, caustic soda lye is used in the food industry, for example in the production of potato starch or milk powder. Furthermore, caustic soda lye finds application in the metalworking industry and in water treatment plants.


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