European chlorine demand remained soft as weak construction activity continued to restrict PVC production. A July 7 industry assessment showed that vinyl producers were still operating in a difficult market shaped by low downstream orders, high power costs and competition from imported materials.
PVC is one of the largest outlets for chlorine in Europe. It is used in pipes, window frames, flooring, cables and other construction products. Lower building activity reduced PVC orders, which limited chlorine consumption across vinyl chloride and PVC plants.
Chlorine and caustic soda are produced together through the electrolysis of brine. Producers cannot increase caustic soda output without also producing chlorine. When PVC plants require less chlorine, chlor-alkali facilities may have to reduce operating rates, even when caustic soda demand remains firmer.
Euro Chlor reported that European chlorine production reached 700,778 tonnes in May 2026. Average daily production stood at 22,606 tonnes, up 7.6% from April and 16.8% from May 2025. Capacity utilisation rose to 70.8%, compared with 61.3% a year earlier.
The higher production level was accompanied by a rise in caustic soda inventories. Stocks reached 235,086 tonnes at the end of May, increasing 15.2% from April and standing 45,374 tonnes above the level recorded in May 2025. The inventory build showed that stronger chlor-alkali output was not fully absorbed by downstream users.
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High electricity costs continued to limit production flexibility. Chlor-alkali plants consume large amounts of power, leaving European producers at a cost disadvantage compared with suppliers in regions with cheaper energy. Plant closures and restructuring have also reduced the number of available suppliers in some markets.
For chlorine buyers, weak PVC demand can improve contract negotiations where several producers operate nearby. Supply risk remains high for customers that depend on one plant or long-distance deliveries. Chlorine is difficult and costly to transport, so local plant operations often matter more than wider regional production levels.
Water-treatment, pulp and paper, bleach and chemical-intermediate producers should review maintenance schedules, backup suppliers and emergency delivery arrangements. Higher output provides some supply support, but weak PVC consumption, rising caustic soda inventories and high power costs continue to affect European chlor-alkali operations.
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