Sulfur dioxide is a critical chemical used across a wide range of industrial and environmental applications. Our Calabrian business supports customers’ need for a reliable supply of ultrapure sulfur dioxide and related derivatives, built on decades of manufacturing expertise and a strong, integrated North American production network. As a leading onpurpose producer, Calabrian delivers highpurity solutions that meet rigorous performance and quality standards across water treatment, mining, energy, and other specialty applications.

Through its proprietary SO₂Clean® process, our Calabrian business produces sulfur dioxide with exceptional consistency while minimizing emissions, wastewater, and by-products compared with competing technologies.

Calabrian Products

Sulfur Dioxide (SO₂) – Produced through Calabrian’s proprietary SO₂ Clean® technology. Used for cyanide destruction in mining and as a reducing agent in paper, wastewater treatment, potable water treatment applications, and in surfactant manufacturing.

Sodium Bisulfite (SBS) and Sodium Thiosulfate – A stable, non-hazardous, and easy-to-use sodium salt of SO₂, used as a reducing agent for dechlorination of chlor-alkali, municipal, and paper water systems and as a preservative and antioxidant in food applications.

Sodium Meta Bisulfite (SMBS) – Used in water treatment applications for chlorine and oxygen removal, for mining in mineral floatation processing, as a preservative and