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Product Overview

Caustic soda, or sodium hydroxide (NaOH), is used as a strong base in the manufacture of products that form a daily part of our lives, including pulp and paper, detergents, foodstuffs, textiles and more. Dow caustic soda is available in various grades:

Product Trade Product Code Availability NaCl wt%, Max
Caustic Soda Solution 50%, Commercial(Diaphragm) Grade 15216 North America, Europe, Latin America 1.00
Caustic Soda Solution 50%, Membrane Grade 45072 North America, Europe, Latin America 0.01
Caustic Soda Solution 50%, Industrial Grade 15338 Canada 1.10
Caustic Soda Solution 50%, Low Salt Grade 15236 Europe 0.01

*French-Canadian version SDS may be obtained by calling (800) 565-1255.

Note: Dow does not typically provide samples of 50% caustic soda solution. A copy of our Sales Specification sheet and Safety Data Sheet are available for your evaluation.

Download a copy of The Caustic Soda Solution Handbook (225KB PDF).

For more specific product and application support, please Contact Us.


Dow Caustic Soda Solution plays an important role in many industries, including.

  • Pulp and paper – The largest application for caustic soda worldwide. Uses include in pulping and bleaching processes, the de-inking of waste paper and water treatment.
  • Textiles – Used to process cotton and dye synthetic fibers, such as nylon and polyester.
  • Soap and detergents – Used in saponification, the chemical process that converts fat, tallow and vegetable oils into soap. It also is used to manufacture anionic surfactants, a crucial component in most detergents and cleaning products.
  • Bleach manufacturing – Used to make bleach, which has industrial and consumer applications such as mold and mildew control around the home.
  • Petroleum products – Used to explore, produce and process petroleum and natural gas.
  • Aluminum production – Used to dissolve bauxite ore, the raw material for aluminum production.
  • Chemical processing – Used as a basic feedstock for a wide range of downstream products, including solvents, plastics, fabrics, adhesives, coatings, herbicides, dyes, inks, pharmaceuticals and more.

Learn more about the beneficial uses of caustic soda at the American Chemistry Council’s The Chlorine Tree website.

Process Overview

A chemical facility that co-produces caustic soda and chlorine is typically referred to as a chlor-alkali (C/A) facility. The chemicals are simultaneously produced as a result of the electrolysis of salt brine. Dow utilizes two electrolytic processes to produce caustic soda solution and chlorine: the diaphragm cell and membrane cell processes.

Shipping and Billing Information

Dow Caustic Soda solution is transported via tank truck, tank car, barge and marine vessel from Dow manufacturing facilities and terminals located across the globe. View additional information on shipping, including quantities for tank trucks or cars.

Learn more about our billing formula.