Ein Unternehmen der Westlake-Gruppe

Enhancing your life everyday!

Ein Unternehmen der Westlake-Gruppe

Enhancing your life everyday!

Chlor-alkali products

Westlake Vinnolit is your local, reliable partner for chlor-alkali products. The satisfaction of our customers is always at the heart of what we do. We therefore have high demands when it comes to the quality of our products and service. Our strengths are a high degree of flexibility, short supply times and reliable deliveries. We also look to the future by developing continuously.

Caustic soda

Caustic soda is an important basic chemical and is used to make paper, glass and ceramics, aluminum, washing and cleaning detergents and viscose fiber, to name just a few examples. It is also used as a neutralization agent, precipitant, cleaning agent and food additive.

We produce caustic soda exclusively using the modern, energy-saving membrane process at our sites in Gendorf and Knapsack. Rock salt, water and electricity are used for chlor-alkali electrolysis. In the membrane process, 32% caustic soda is created, which is then concentrated to 50%.

Vinnolit GreenVin®

For the production of Caustic Soda Solution (NaOH 50%) GreenVin® we use Renewable Energy Guarantees of Origin (GOs/HKNs). Thus, the carbon footprint of Vinnolit GreenVin® caustic soda is reduced by about one third compared to our conventional caustic soda.  This product will enable our customers to reduce their own carbon footprint and in turn develop more climate-friendly products.

Other chlor-alkali products

Our wide product range also includes vinyl chloride and tin tetrachloride, which are required, among other things, for further processing in the chemical industry. 

Our Products

Caustic Soda

Product data sheet

Standard specifications

Safety data sheet

Tin tetrachloride

Safety data sheet

Vinyl chloride

Safety data sheet


Safety data sheet


Westlake Vinnolit is certified according to ISO 9001 (quality management), 14001 (environmental management) and 50001 (energy management), as well as ISO 45001 and OHRIS (both occupational safety). Compliance with the relevant standard requirements is confirmed by independent auditors in regular audits.

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