Polysulfone (PSU) / Polyethersulfone (PES) Resin

Specialty chemicals company spun off from Solvay SA on December 9, 2023; inherited Solvay's specialty chemicals portfolio including the Aroma Performance business unit (vanillin + hydroquinone). Self-described 'world's largest integrated producer of synthetic and natural vanillin.' Holds ~18% global vanillin market share. Filed 2024 US antidumping/countervailing duty petitions against Chinese vanillin imports. Announced intent to divest the Aroma Performance unit (no buyer named as of early 2026). Saint-Fons, France plant mothballed May 2024 due to Chinese competition; restarting late 2025 after EU imposed 131% anti-dumping duties on Chinese vanillin.

World's largest integrated dialysis company — operates 4,000+ clinics AND manufactures dialysis products. Produces >50 million dialyzers/year (~43% global share). Products: FX series (Helixone polysulfone), GranuFlo/NaturaLyte concentrates. Unique dual position as both the world's largest dialyzer maker and the world's largest buyer of its own dialyzers through its clinic operations.

World's largest chemical company by revenue; dominant Western producer of food-grade sodium nitrite. BASF expanded sodium nitrite production capacity in Germany specifically to meet growing demand for high-purity pharmaceutical and food applications. Primary production at Ludwigshafen (world's largest contiguous chemical complex). Also produces sodium nitrite catalysts, sulfuric acid, and intermediates for pharmaceutical synthesis. BASF sells food-grade sodium nitrite to meat processors globally through distribution networks and third-party channels.

Sumitomo Chemical Co. Ltd. (Tokyo Japan; TYO: 4005; Sumitomo Group); #3 global DL-methionine producer at ~13% market share via Niihama Ehime Works (Ehime Prefecture Shikoku Japan). After a major expansion completed October 2018 (+100,000 MT/year new line), the Niihama facility reached ~250,000 MT/year — one of the world's largest single methionine plants. Also produces crop protection chemicals (agrichemicals), petrochemicals, and pharmaceuticals. The MetiPEARL / liquid methionine brand competes directly with Evonik MetAMINO and Adisseo Rhodimet in Asian poultry markets. Japan is the only significant Japanese methionine production base globally.

Subsidiary of Asahi Kasei Corporation producing Rexeed and APS series PES dialyzers. Operates the Nobeoka, Miyazaki facility — a large-scale dialyzer manufacturing campus. Asahi Kasei developed the first high-flux polysulfone membrane in the 1970s and remains a major global dialyzer OEM supplier.