Caustic soda

Caustic soda is a solution of sodium hydroxide (NaOH) in water and is available in various concentrations. The clear, odourless liquid is strongly alkaline and corrosive. Caustic soda is produced on a large scale at Donau Chemie using an environmentally friendly membrane process called chlor-alkali electrolysis of a sodium chloride solution. The by-products are chlorine and hydrogen.


2 NaCl + 2 H2O → 2 NaOH + Cl2 + H2

Caustic soda is one of the most commonly used laboratory and industrial chemicals. The areas of application of caustic soda are diverse. It is used in many processes as a neutralising agent or basic medium and is also used for bauxite decomposition in aluminium production. Furthermore, caustic soda is used for the production of pulp in the paper and textile industry. Caustic soda is an important auxiliary material for the soap and dye industry. Caustic soda is also used in many industrial conversion, processing and cleaning processes. Other uses of caustic soda are in photography as an additive in developing and fixing baths and as a pulp lye in the food industry.

 

Caustic soda flakes

Solid sodium hydroxide (NaOH), also known as caustic soda, is easy to dose, very hygroscopic and dissolves quickly in water under strong heating to form caustic soda. Donau Chemie offers caustic soda in the form of flakes with an NaOH content of around 98 percent in different qualities.
 

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