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In Tarragona, Covestro has an MDI (methylene diisocyanate) and hydrogen chloride plant, a chlorine and caustic soda plant, a railway hub, and infrastructures for other companies in the Chemical Park.

MDI is mainly used as a rigid polyurethane precursor for thermal insulation in construction applications. Hydrochloric acid is the basis for many hygiene and sanitation products, such as water treatment or in the food industry. Caustic soda is used in sectors as diverse as stationery, soaps and detergents, and the food industry.

The Covestro Chemical Park in Tarragona also hosts four companies it shares services with: Elix Polymers, Plixxent, Kemira, and Bertschi.