Sustainability is an integral part of Orbia’s commitment to advance life around the world. Quite simply, we aim to give rather than take. On our path to become a purpose-driven, future-fit organization, we’re working with governments, the private sector, and local not-for-profit organizations around the world to help bring about a more livable future.

Because together, we can push the boundaries for a better tomorrow.

Our Products

Caustic Soda Blue

Vestolit’s PVC production plant in Marl, Germany, is fully backward integrated, meaning that the monomer building blocks to produce PVC are manufactured at this same site. An important preliminary product is chlorine, which is produced by electrolysis using salt (sodium chloride). The salt reaches the site dissolved in water via pipeline. In Marl, Vestolit operates a modern membrane electrolysis facility, where the salt solution is separated into chlorine, caustic soda and hydrogen using an electric current.

Because electrolysis is an energy-intensive process, electrical energy is considered a raw material. By replacing a portion of the regular electric energy supply to renewable energy, Vestolit can reduce its carbon emissions. And additionally, offer a byproduct made from renewable energy: Caustic Soda Blue.

Why renewable energy?

To produce Caustic Soda Blue, Vestolit uses electricity generated from renewable elements that our blue planet is providing, such as wind, sunlight or water. The result is a significantly lower carbon footprint compared to conventionally produced Caustic Soda.

Where is Caustic Soda used?

Vestolit’s chlor-alkali products are used in many industrial and chemical production processes. Main areas of usage include water treatment, metal-working, cleaning and disinfection products as well as the manufacture of raw materials for computer chips and silicone production.​​​​​

Main Industries
  • ​​​​​​​Aluminum industry
  • Chemical industry
  • Food industry
  • Mineral oil industry
  • Pulp and paper industry
  • ​​​​​Desulphurization
  • Soaps, surfactants & cleaning agents
  • Textile industry, rayon & staple fibers
  • Glass & glass fibers
  • Water treatment
No product restrictions

Vestolit’s renewable Caustic Soda Blue is in line with the same specifications and product quality aspects as our conventionally-produced Caustic Soda. There are no restrictions in quality or processing.


The Caustic Soda Blue is certified under the ISCC PLUS certification. ISCC is a globally leading certification system providing sustainability solutions for fully traceable and deforestation-free supply chains. ​​​​​​​

Our Contribution to a Sustainable Future

Adding Caustic Soda Blue to Vestolit’s product portfolio shows its contribution to fulfill advancing life around the world by creating solutions for a healthy and sustainable future. Vestolit customers will be able to reduce their carbon footprint by using our Caustic Soda Blue and therefore creating sustainable applications.

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